/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 04:02:11,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 04:02:11,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 04:02:11,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 04:02:11,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 04:02:11,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 04:02:11,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 04:02:11,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 04:02:11,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 04:02:11,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 04:02:11,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 04:02:11,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 04:02:11,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 04:02:11,473 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 04:02:11,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 04:02:11,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 04:02:11,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 04:02:11,500 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 [2021-04-15 04:02:11,520 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 04:02:11,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 04:02:11,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 04:02:11,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 04:02:11,522 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 04:02:11,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 04:02:11,522 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 04:02:11,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 04:02:11,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 04:02:11,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 04:02:11,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 04:02:11,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 04:02:11,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 04:02:11,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:02:11,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 04:02:11,524 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 04:02:11,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 04:02:11,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 04:02:11,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 04:02:11,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 04:02:11,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 04:02:11,815 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 04:02:11,816 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 04:02:11,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-04-15 04:02:11,817 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-04-15 04:02:11,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 04:02:11,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 04:02:11,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 04:02:11,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 04:02:11,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 04:02:11,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 04:02:11,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 04:02:11,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 04:02:11,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 04:02:11,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... [2021-04-15 04:02:11,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 04:02:11,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 04:02:11,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 04:02:11,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 04:02:11,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 04:02:11,968 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 04:02:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 04:02:11,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 04:02:11,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 04:02:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 04:02:11,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 04:02:11,969 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 04:02:11,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 04:02:11,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 04:02:11,970 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 04:02:12,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 04:02:12,141 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 04:02:12,150 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:02:12 BoogieIcfgContainer [2021-04-15 04:02:12,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 04:02:12,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 04:02:12,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 04:02:12,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 04:02:12,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 04:02:11" (1/2) ... [2021-04-15 04:02:12,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7a1648 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:02:12, skipping insertion in model container [2021-04-15 04:02:12,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:02:12" (2/2) ... [2021-04-15 04:02:12,157 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-04-15 04:02:12,160 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 04:02:12,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 04:02:12,163 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 04:02:12,164 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 04:02:12,185 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 04:02:12,210 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 04:02:12,224 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 04:02:12,224 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 04:02:12,224 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 04:02:12,225 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 04:02:12,225 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 04:02:12,225 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 04:02:12,225 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 04:02:12,225 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 04:02:12,232 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-04-15 04:02:12,242 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 04:02:12,249 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:12,249 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:12,249 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1737383228, now seen corresponding path program 1 times [2021-04-15 04:02:12,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:12,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602354624] [2021-04-15 04:02:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:12,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602354624] [2021-04-15 04:02:12,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:02:12,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 04:02:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341950204] [2021-04-15 04:02:12,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 04:02:12,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:12,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 04:02:12,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:02:12,397 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:12,427 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-04-15 04:02:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 04:02:12,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 04:02:12,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:12,439 INFO L225 Difference]: With dead ends: 84 [2021-04-15 04:02:12,439 INFO L226 Difference]: Without dead ends: 84 [2021-04-15 04:02:12,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 04:02:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-04-15 04:02:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-04-15 04:02:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-04-15 04:02:12,483 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-04-15 04:02:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:12,483 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-04-15 04:02:12,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-04-15 04:02:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:02:12,486 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:12,486 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:12,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 04:02:12,487 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:12,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:12,491 INFO L82 PathProgramCache]: Analyzing trace with hash -425397927, now seen corresponding path program 1 times [2021-04-15 04:02:12,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:12,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707615410] [2021-04-15 04:02:12,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:12,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707615410] [2021-04-15 04:02:12,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397114743] [2021-04-15 04:02:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:12,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:02:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:12,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:12,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-04-15 04:02:12,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412652409] [2021-04-15 04:02:12,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:02:12,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:02:12,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:02:12,978 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:13,214 INFO L93 Difference]: Finished difference Result 167 states and 303 transitions. [2021-04-15 04:02:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:02:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 04:02:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:13,216 INFO L225 Difference]: With dead ends: 167 [2021-04-15 04:02:13,216 INFO L226 Difference]: Without dead ends: 132 [2021-04-15 04:02:13,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-04-15 04:02:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2021-04-15 04:02:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.956043956043956) internal successors, (178), 91 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 178 transitions. [2021-04-15 04:02:13,224 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 178 transitions. Word has length 19 [2021-04-15 04:02:13,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:13,225 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 178 transitions. [2021-04-15 04:02:13,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:13,225 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2021-04-15 04:02:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:02:13,226 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:13,226 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:13,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 04:02:13,429 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash 424057207, now seen corresponding path program 2 times [2021-04-15 04:02:13,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:13,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52556316] [2021-04-15 04:02:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:13,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52556316] [2021-04-15 04:02:13,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735961489] [2021-04-15 04:02:13,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:13,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:02:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:13,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:13,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 04:02:13,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106978425] [2021-04-15 04:02:13,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:02:13,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:13,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:02:13,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:02:13,773 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:13,993 INFO L93 Difference]: Finished difference Result 167 states and 305 transitions. [2021-04-15 04:02:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:02:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 04:02:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:13,997 INFO L225 Difference]: With dead ends: 167 [2021-04-15 04:02:14,001 INFO L226 Difference]: Without dead ends: 139 [2021-04-15 04:02:14,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:02:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-04-15 04:02:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2021-04-15 04:02:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 183 transitions. [2021-04-15 04:02:14,014 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 183 transitions. Word has length 19 [2021-04-15 04:02:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:14,014 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 183 transitions. [2021-04-15 04:02:14,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 183 transitions. [2021-04-15 04:02:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 04:02:14,015 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:14,015 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:14,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:14,221 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:14,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1628191443, now seen corresponding path program 3 times [2021-04-15 04:02:14,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:14,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682526095] [2021-04-15 04:02:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:14,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682526095] [2021-04-15 04:02:14,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274875348] [2021-04-15 04:02:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:14,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:02:14,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:02:14,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:14,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:14,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-04-15 04:02:14,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058153618] [2021-04-15 04:02:14,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:02:14,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:14,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:02:14,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:02:14,487 INFO L87 Difference]: Start difference. First operand 95 states and 183 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:14,753 INFO L93 Difference]: Finished difference Result 141 states and 262 transitions. [2021-04-15 04:02:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:02:14,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 04:02:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:14,754 INFO L225 Difference]: With dead ends: 141 [2021-04-15 04:02:14,754 INFO L226 Difference]: Without dead ends: 113 [2021-04-15 04:02:14,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:02:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-04-15 04:02:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-04-15 04:02:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 170 transitions. [2021-04-15 04:02:14,758 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 170 transitions. Word has length 19 [2021-04-15 04:02:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:14,758 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 170 transitions. [2021-04-15 04:02:14,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 170 transitions. [2021-04-15 04:02:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 04:02:14,759 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:14,759 INFO L551 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] [2021-04-15 04:02:14,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:14,969 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:14,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1114878874, now seen corresponding path program 1 times [2021-04-15 04:02:14,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:14,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349850364] [2021-04-15 04:02:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:15,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349850364] [2021-04-15 04:02:15,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998951094] [2021-04-15 04:02:15,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:02:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:15,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:15,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:15,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:15,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:15,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-04-15 04:02:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:15,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:15,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-04-15 04:02:15,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682853043] [2021-04-15 04:02:15,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 04:02:15,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:15,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 04:02:15,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 04:02:15,124 INFO L87 Difference]: Start difference. First operand 89 states and 170 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:15,180 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-04-15 04:02:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 04:02:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 04:02:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:15,181 INFO L225 Difference]: With dead ends: 124 [2021-04-15 04:02:15,181 INFO L226 Difference]: Without dead ends: 124 [2021-04-15 04:02:15,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:02:15,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-04-15 04:02:15,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2021-04-15 04:02:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9482758620689655) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 226 transitions. [2021-04-15 04:02:15,195 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 226 transitions. Word has length 22 [2021-04-15 04:02:15,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:15,196 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 226 transitions. [2021-04-15 04:02:15,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 226 transitions. [2021-04-15 04:02:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:15,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:15,201 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:15,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:15,419 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:15,420 INFO L82 PathProgramCache]: Analyzing trace with hash 543374211, now seen corresponding path program 2 times [2021-04-15 04:02:15,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:15,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623925662] [2021-04-15 04:02:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:15,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623925662] [2021-04-15 04:02:15,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981898114] [2021-04-15 04:02:15,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:15,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:15,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:15,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:15,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:15,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:15,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:15,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:15,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:15,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-04-15 04:02:15,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789344586] [2021-04-15 04:02:15,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:02:15,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:15,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:02:15,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:02:15,866 INFO L87 Difference]: Start difference. First operand 117 states and 226 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:16,354 INFO L93 Difference]: Finished difference Result 213 states and 403 transitions. [2021-04-15 04:02:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:02:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:16,362 INFO L225 Difference]: With dead ends: 213 [2021-04-15 04:02:16,362 INFO L226 Difference]: Without dead ends: 204 [2021-04-15 04:02:16,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:02:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-04-15 04:02:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 148. [2021-04-15 04:02:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.9251700680272108) internal successors, (283), 147 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 283 transitions. [2021-04-15 04:02:16,376 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 283 transitions. Word has length 26 [2021-04-15 04:02:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:16,377 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 283 transitions. [2021-04-15 04:02:16,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 283 transitions. [2021-04-15 04:02:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:16,379 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:16,379 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:16,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-04-15 04:02:16,593 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1138730303, now seen corresponding path program 3 times [2021-04-15 04:02:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:16,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184894268] [2021-04-15 04:02:16,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:16,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184894268] [2021-04-15 04:02:16,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189512917] [2021-04-15 04:02:16,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:16,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:02:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:16,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:16,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:16,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:16,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:16,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:16,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:16,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:16,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 04:02:16,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637926205] [2021-04-15 04:02:16,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 04:02:16,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 04:02:16,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:02:16,966 INFO L87 Difference]: Start difference. First operand 148 states and 283 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:17,462 INFO L93 Difference]: Finished difference Result 249 states and 472 transitions. [2021-04-15 04:02:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:02:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:17,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:17,464 INFO L225 Difference]: With dead ends: 249 [2021-04-15 04:02:17,464 INFO L226 Difference]: Without dead ends: 240 [2021-04-15 04:02:17,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:02:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-04-15 04:02:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2021-04-15 04:02:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.9477124183006536) internal successors, (298), 153 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 298 transitions. [2021-04-15 04:02:17,470 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 298 transitions. Word has length 26 [2021-04-15 04:02:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:17,472 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 298 transitions. [2021-04-15 04:02:17,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 298 transitions. [2021-04-15 04:02:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:17,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:17,473 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:17,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:17,691 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:17,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:17,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1169241475, now seen corresponding path program 4 times [2021-04-15 04:02:17,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:17,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273454321] [2021-04-15 04:02:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:17,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273454321] [2021-04-15 04:02:17,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184353610] [2021-04-15 04:02:17,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:17,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:17,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:17,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:17,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:17,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:17,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:18,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:18,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 04:02:18,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104189000] [2021-04-15 04:02:18,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 04:02:18,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:18,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 04:02:18,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:02:18,095 INFO L87 Difference]: Start difference. First operand 154 states and 298 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:18,680 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2021-04-15 04:02:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:02:18,680 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:18,681 INFO L225 Difference]: With dead ends: 283 [2021-04-15 04:02:18,681 INFO L226 Difference]: Without dead ends: 274 [2021-04-15 04:02:18,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:02:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-04-15 04:02:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 155. [2021-04-15 04:02:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9545454545454546) internal successors, (301), 154 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 301 transitions. [2021-04-15 04:02:18,688 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 301 transitions. Word has length 26 [2021-04-15 04:02:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:18,689 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 301 transitions. [2021-04-15 04:02:18,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 301 transitions. [2021-04-15 04:02:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:18,690 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:18,691 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:18,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:18,897 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:18,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483455, now seen corresponding path program 5 times [2021-04-15 04:02:18,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:18,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278431330] [2021-04-15 04:02:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:19,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278431330] [2021-04-15 04:02:19,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461387660] [2021-04-15 04:02:19,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:19,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:19,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:19,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:19,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-04-15 04:02:19,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:19,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:19,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:19,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-04-15 04:02:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:19,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:19,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-04-15 04:02:19,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522584890] [2021-04-15 04:02:19,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 04:02:19,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:19,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 04:02:19,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-04-15 04:02:19,278 INFO L87 Difference]: Start difference. First operand 155 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:19,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:19,970 INFO L93 Difference]: Finished difference Result 312 states and 596 transitions. [2021-04-15 04:02:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:02:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:19,972 INFO L225 Difference]: With dead ends: 312 [2021-04-15 04:02:19,972 INFO L226 Difference]: Without dead ends: 303 [2021-04-15 04:02:19,973 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 04:02:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-04-15 04:02:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 160. [2021-04-15 04:02:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9811320754716981) internal successors, (315), 159 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 315 transitions. [2021-04-15 04:02:19,978 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 315 transitions. Word has length 26 [2021-04-15 04:02:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:19,978 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 315 transitions. [2021-04-15 04:02:19,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 315 transitions. [2021-04-15 04:02:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:19,978 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:19,978 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:20,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-04-15 04:02:20,198 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389953, now seen corresponding path program 6 times [2021-04-15 04:02:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:20,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152507786] [2021-04-15 04:02:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:20,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152507786] [2021-04-15 04:02:20,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 04:02:20,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 04:02:20,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565956638] [2021-04-15 04:02:20,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 04:02:20,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 04:02:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:02:20,222 INFO L87 Difference]: Start difference. First operand 160 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:20,248 INFO L93 Difference]: Finished difference Result 319 states and 616 transitions. [2021-04-15 04:02:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 04:02:20,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:20,250 INFO L225 Difference]: With dead ends: 319 [2021-04-15 04:02:20,250 INFO L226 Difference]: Without dead ends: 291 [2021-04-15 04:02:20,250 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-04-15 04:02:20,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-04-15 04:02:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2021-04-15 04:02:20,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:20,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-04-15 04:02:20,256 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-04-15 04:02:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:20,256 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-04-15 04:02:20,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-04-15 04:02:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:20,257 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:20,257 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:20,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 04:02:20,257 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:20,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:20,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1848637673, now seen corresponding path program 7 times [2021-04-15 04:02:20,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:20,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621924879] [2021-04-15 04:02:20,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:20,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621924879] [2021-04-15 04:02:20,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881665463] [2021-04-15 04:02:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:20,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:20,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:20,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:20,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:20,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:20,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-04-15 04:02:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:20,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:20,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:20,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060495161] [2021-04-15 04:02:20,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:20,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:20,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:20,717 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:21,153 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-04-15 04:02:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:02:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:21,155 INFO L225 Difference]: With dead ends: 321 [2021-04-15 04:02:21,155 INFO L226 Difference]: Without dead ends: 293 [2021-04-15 04:02:21,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 517.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:02:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-04-15 04:02:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-04-15 04:02:21,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-04-15 04:02:21,161 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-04-15 04:02:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:21,161 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-04-15 04:02:21,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:21,161 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-04-15 04:02:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:21,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:21,163 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:21,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:21,371 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:21,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2081701755, now seen corresponding path program 8 times [2021-04-15 04:02:21,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:21,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905836837] [2021-04-15 04:02:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905836837] [2021-04-15 04:02:21,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679419318] [2021-04-15 04:02:21,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:21,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:21,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-04-15 04:02:21,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:21,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:21,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:21,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-04-15 04:02:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:21,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:21,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:21,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037377005] [2021-04-15 04:02:21,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:21,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:21,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:21,763 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:22,223 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-04-15 04:02:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:02:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:22,225 INFO L225 Difference]: With dead ends: 349 [2021-04-15 04:02:22,225 INFO L226 Difference]: Without dead ends: 317 [2021-04-15 04:02:22,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:02:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-04-15 04:02:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-04-15 04:02:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-04-15 04:02:22,231 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-04-15 04:02:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:22,232 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-04-15 04:02:22,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-04-15 04:02:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:22,232 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:22,232 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:22,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:22,448 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash 226270023, now seen corresponding path program 9 times [2021-04-15 04:02:22,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:22,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700945336] [2021-04-15 04:02:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:22,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700945336] [2021-04-15 04:02:22,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309093163] [2021-04-15 04:02:22,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:22,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:02:22,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:22,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:22,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:22,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:22,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:22,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:22,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:22,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:22,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:22,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:22,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690393674] [2021-04-15 04:02:22,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:22,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:22,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:22,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:22,850 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:23,388 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-04-15 04:02:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:02:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:23,389 INFO L225 Difference]: With dead ends: 386 [2021-04-15 04:02:23,389 INFO L226 Difference]: Without dead ends: 354 [2021-04-15 04:02:23,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:02:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-04-15 04:02:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-04-15 04:02:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:23,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-04-15 04:02:23,396 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-04-15 04:02:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:23,396 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-04-15 04:02:23,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:23,396 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-04-15 04:02:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:23,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:23,396 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:23,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 04:02:23,602 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1652512389, now seen corresponding path program 10 times [2021-04-15 04:02:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:23,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96782269] [2021-04-15 04:02:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96782269] [2021-04-15 04:02:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843403953] [2021-04-15 04:02:23,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:23,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:23,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:23,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:23,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:23,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:23,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:23,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:23,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:23,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:23,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73001855] [2021-04-15 04:02:23,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:23,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:23,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:23,998 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:24,628 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-04-15 04:02:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:02:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:24,630 INFO L225 Difference]: With dead ends: 429 [2021-04-15 04:02:24,630 INFO L226 Difference]: Without dead ends: 397 [2021-04-15 04:02:24,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:02:24,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-04-15 04:02:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-04-15 04:02:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-04-15 04:02:24,640 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-04-15 04:02:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:24,640 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-04-15 04:02:24,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-04-15 04:02:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:24,641 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:24,641 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:24,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 04:02:24,859 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash 632062879, now seen corresponding path program 11 times [2021-04-15 04:02:24,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:24,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037739598] [2021-04-15 04:02:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:24,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037739598] [2021-04-15 04:02:24,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805690062] [2021-04-15 04:02:24,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:25,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:25,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:25,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:25,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-04-15 04:02:25,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:25,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:25,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:25,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-04-15 04:02:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:25,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:25,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:25,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437881887] [2021-04-15 04:02:25,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:25,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:25,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:25,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:25,221 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:25,714 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-04-15 04:02:25,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:02:25,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:25,716 INFO L225 Difference]: With dead ends: 331 [2021-04-15 04:02:25,716 INFO L226 Difference]: Without dead ends: 303 [2021-04-15 04:02:25,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:02:25,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-04-15 04:02:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-04-15 04:02:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-04-15 04:02:25,722 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-04-15 04:02:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:25,722 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-04-15 04:02:25,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:25,722 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-04-15 04:02:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:25,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:25,723 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:25,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 04:02:25,937 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1575102459, now seen corresponding path program 12 times [2021-04-15 04:02:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:25,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198510386] [2021-04-15 04:02:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:26,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198510386] [2021-04-15 04:02:26,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821763290] [2021-04-15 04:02:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:26,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:02:26,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:26,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:26,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:26,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:26,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:26,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:26,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:26,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:26,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:26,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140486254] [2021-04-15 04:02:26,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:26,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:26,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:26,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:26,300 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:26,752 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-04-15 04:02:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:02:26,753 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:26,754 INFO L225 Difference]: With dead ends: 355 [2021-04-15 04:02:26,754 INFO L226 Difference]: Without dead ends: 323 [2021-04-15 04:02:26,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:02:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-04-15 04:02:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-04-15 04:02:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-04-15 04:02:26,762 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-04-15 04:02:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:26,762 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-04-15 04:02:26,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-04-15 04:02:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:26,763 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:26,763 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:26,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:26,977 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:26,977 INFO L82 PathProgramCache]: Analyzing trace with hash -411893059, now seen corresponding path program 13 times [2021-04-15 04:02:26,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:26,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989468431] [2021-04-15 04:02:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:27,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989468431] [2021-04-15 04:02:27,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698023910] [2021-04-15 04:02:27,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:27,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:27,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:27,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:27,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:27,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:27,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:27,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:27,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358584249] [2021-04-15 04:02:27,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:27,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:27,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:27,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:27,339 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:27,830 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-04-15 04:02:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 04:02:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:27,832 INFO L225 Difference]: With dead ends: 392 [2021-04-15 04:02:27,832 INFO L226 Difference]: Without dead ends: 360 [2021-04-15 04:02:27,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:02:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-04-15 04:02:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-04-15 04:02:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-04-15 04:02:27,838 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-04-15 04:02:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:27,838 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-04-15 04:02:27,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-04-15 04:02:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:27,838 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:27,839 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:28,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 04:02:28,052 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1014349307, now seen corresponding path program 14 times [2021-04-15 04:02:28,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:28,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703680558] [2021-04-15 04:02:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:28,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703680558] [2021-04-15 04:02:28,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025271944] [2021-04-15 04:02:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:02:28,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:28,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:28,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:28,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:28,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:28,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:28,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:28,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-04-15 04:02:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:28,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:28,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:28,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418455970] [2021-04-15 04:02:28,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:28,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:28,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:28,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:28,421 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:29,004 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-04-15 04:02:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:02:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:29,006 INFO L225 Difference]: With dead ends: 435 [2021-04-15 04:02:29,006 INFO L226 Difference]: Without dead ends: 403 [2021-04-15 04:02:29,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:02:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-04-15 04:02:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-04-15 04:02:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-04-15 04:02:29,012 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-04-15 04:02:29,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:29,012 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-04-15 04:02:29,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:29,012 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-04-15 04:02:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:29,013 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:29,013 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:29,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 04:02:29,229 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash -6100203, now seen corresponding path program 15 times [2021-04-15 04:02:29,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:29,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578816723] [2021-04-15 04:02:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:29,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578816723] [2021-04-15 04:02:29,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593168278] [2021-04-15 04:02:29,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:29,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:02:29,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:29,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:29,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:29,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:29,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:29,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:29,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-04-15 04:02:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:29,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:29,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:29,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151664934] [2021-04-15 04:02:29,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:29,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:29,594 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:30,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:30,056 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-04-15 04:02:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:02:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:30,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:30,058 INFO L225 Difference]: With dead ends: 337 [2021-04-15 04:02:30,058 INFO L226 Difference]: Without dead ends: 309 [2021-04-15 04:02:30,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 482.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:02:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-04-15 04:02:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-04-15 04:02:30,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:30,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-04-15 04:02:30,062 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-04-15 04:02:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:30,063 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-04-15 04:02:30,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-04-15 04:02:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:30,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:30,063 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:30,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:30,266 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 942965637, now seen corresponding path program 16 times [2021-04-15 04:02:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:30,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307430947] [2021-04-15 04:02:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:30,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307430947] [2021-04-15 04:02:30,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530194880] [2021-04-15 04:02:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:02:30,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:30,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:30,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:30,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-04-15 04:02:30,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:30,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:30,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:30,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-04-15 04:02:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:30,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:30,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:30,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529900951] [2021-04-15 04:02:30,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:30,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:30,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:30,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:30,647 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:31,122 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-04-15 04:02:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:02:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:31,124 INFO L225 Difference]: With dead ends: 343 [2021-04-15 04:02:31,124 INFO L226 Difference]: Without dead ends: 311 [2021-04-15 04:02:31,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:02:31,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-04-15 04:02:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-04-15 04:02:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-04-15 04:02:31,129 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-04-15 04:02:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:31,129 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-04-15 04:02:31,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-04-15 04:02:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:31,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:31,130 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:31,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:31,346 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1044029881, now seen corresponding path program 17 times [2021-04-15 04:02:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:31,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306891498] [2021-04-15 04:02:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306891498] [2021-04-15 04:02:31,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248144040] [2021-04-15 04:02:31,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:31,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:31,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:02:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:31,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:31,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:31,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:31,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:31,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-04-15 04:02:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:31,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:31,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921473542] [2021-04-15 04:02:31,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:31,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:31,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:31,710 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:32,188 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-04-15 04:02:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:02:32,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:32,189 INFO L225 Difference]: With dead ends: 378 [2021-04-15 04:02:32,190 INFO L226 Difference]: Without dead ends: 346 [2021-04-15 04:02:32,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:02:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-04-15 04:02:32,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-04-15 04:02:32,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-04-15 04:02:32,194 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-04-15 04:02:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:32,194 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-04-15 04:02:32,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:32,195 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-04-15 04:02:32,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:32,195 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:32,195 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:32,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:32,409 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:32,409 INFO L82 PathProgramCache]: Analyzing trace with hash 382212485, now seen corresponding path program 18 times [2021-04-15 04:02:32,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:32,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327891228] [2021-04-15 04:02:32,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:32,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327891228] [2021-04-15 04:02:32,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744326643] [2021-04-15 04:02:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:32,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 04:02:32,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:32,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:32,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:32,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:32,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:32,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:32,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:32,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-04-15 04:02:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:32,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:32,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:32,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287044711] [2021-04-15 04:02:32,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:32,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:32,759 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:33,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:33,372 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-04-15 04:02:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:02:33,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:33,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:33,374 INFO L225 Difference]: With dead ends: 410 [2021-04-15 04:02:33,374 INFO L226 Difference]: Without dead ends: 378 [2021-04-15 04:02:33,374 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:02:33,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-04-15 04:02:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-04-15 04:02:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-04-15 04:02:33,379 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-04-15 04:02:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:33,379 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-04-15 04:02:33,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-04-15 04:02:33,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 04:02:33,380 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:33,380 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:33,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 04:02:33,596 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:33,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:33,596 INFO L82 PathProgramCache]: Analyzing trace with hash -638237025, now seen corresponding path program 19 times [2021-04-15 04:02:33,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:33,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196061027] [2021-04-15 04:02:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:33,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196061027] [2021-04-15 04:02:33,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405331681] [2021-04-15 04:02:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 04:02:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:33,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:33,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:33,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:33,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-04-15 04:02:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:34,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:34,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-04-15 04:02:34,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070024638] [2021-04-15 04:02:34,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 04:02:34,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:34,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 04:02:34,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:34,024 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:34,514 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-04-15 04:02:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:02:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 04:02:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:34,516 INFO L225 Difference]: With dead ends: 307 [2021-04-15 04:02:34,516 INFO L226 Difference]: Without dead ends: 279 [2021-04-15 04:02:34,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:02:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-04-15 04:02:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-04-15 04:02:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-04-15 04:02:34,520 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-04-15 04:02:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:34,520 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-04-15 04:02:34,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-04-15 04:02:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-04-15 04:02:34,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:34,521 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:34,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 04:02:34,729 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash 480945784, now seen corresponding path program 20 times [2021-04-15 04:02:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:34,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300118934] [2021-04-15 04:02:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300118934] [2021-04-15 04:02:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811012083] [2021-04-15 04:02:34,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:34,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:34,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:34,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 04:02:34,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:34,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:34,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-04-15 04:02:34,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:34,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:34,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:34,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-04-15 04:02:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:34,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:34,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 04:02:34,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702059492] [2021-04-15 04:02:34,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:02:34,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:02:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:02:34,957 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:35,202 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-04-15 04:02:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 04:02:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-04-15 04:02:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:35,203 INFO L225 Difference]: With dead ends: 362 [2021-04-15 04:02:35,203 INFO L226 Difference]: Without dead ends: 362 [2021-04-15 04:02:35,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:02:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-04-15 04:02:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-04-15 04:02:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-04-15 04:02:35,208 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-04-15 04:02:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:35,208 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-04-15 04:02:35,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-04-15 04:02:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 04:02:35,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:35,209 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:35,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:35,425 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1371755552, now seen corresponding path program 21 times [2021-04-15 04:02:35,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:35,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395485602] [2021-04-15 04:02:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:35,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395485602] [2021-04-15 04:02:35,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309933556] [2021-04-15 04:02:35,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:35,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:02:35,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:35,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 04:02:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:35,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:35,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-04-15 04:02:35,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992419376] [2021-04-15 04:02:35,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 04:02:35,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:35,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 04:02:35,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:02:35,525 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:35,538 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-04-15 04:02:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 04:02:35,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 04:02:35,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:35,540 INFO L225 Difference]: With dead ends: 534 [2021-04-15 04:02:35,540 INFO L226 Difference]: Without dead ends: 491 [2021-04-15 04:02:35,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-04-15 04:02:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-04-15 04:02:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-04-15 04:02:35,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:35,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-04-15 04:02:35,553 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-04-15 04:02:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:35,553 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-04-15 04:02:35,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-04-15 04:02:35,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:35,555 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:35,555 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:35,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 04:02:35,761 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1245561707, now seen corresponding path program 22 times [2021-04-15 04:02:35,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:35,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005817616] [2021-04-15 04:02:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:36,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005817616] [2021-04-15 04:02:36,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704419736] [2021-04-15 04:02:36,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:36,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:36,213 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:02:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:02:36,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:36,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:36,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:36,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:02:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:36,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:36,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-04-15 04:02:36,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903731652] [2021-04-15 04:02:36,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 04:02:36,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 04:02:36,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:02:36,327 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:37,103 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-04-15 04:02:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:02:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:37,105 INFO L225 Difference]: With dead ends: 550 [2021-04-15 04:02:37,105 INFO L226 Difference]: Without dead ends: 502 [2021-04-15 04:02:37,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 778.1ms TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 04:02:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-04-15 04:02:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-04-15 04:02:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-04-15 04:02:37,117 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-04-15 04:02:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:37,118 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-04-15 04:02:37,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-04-15 04:02:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:37,118 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:37,118 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:37,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:37,333 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:37,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:37,333 INFO L82 PathProgramCache]: Analyzing trace with hash -482243373, now seen corresponding path program 23 times [2021-04-15 04:02:37,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:37,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389560366] [2021-04-15 04:02:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389560366] [2021-04-15 04:02:37,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382043405] [2021-04-15 04:02:37,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:37,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:02:37,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:37,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:02:37,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:37,837 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:02:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:02:37,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:37,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:37,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:37,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:02:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:37,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:37,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-04-15 04:02:37,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111059509] [2021-04-15 04:02:37,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:02:37,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:02:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:02:37,957 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:38,987 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-04-15 04:02:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:02:38,987 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:38,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:38,989 INFO L225 Difference]: With dead ends: 574 [2021-04-15 04:02:38,989 INFO L226 Difference]: Without dead ends: 526 [2021-04-15 04:02:38,990 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 874.3ms TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:02:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-04-15 04:02:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-04-15 04:02:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-04-15 04:02:38,995 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-04-15 04:02:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:38,996 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-04-15 04:02:38,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:38,996 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-04-15 04:02:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:38,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:38,997 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:39,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 04:02:39,201 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 797128341, now seen corresponding path program 24 times [2021-04-15 04:02:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:39,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977246188] [2021-04-15 04:02:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977246188] [2021-04-15 04:02:39,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978856183] [2021-04-15 04:02:39,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:39,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:02:39,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:39,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:39,702 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:02:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:02:39,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:39,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:39,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:39,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:02:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:39,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:39,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-04-15 04:02:39,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177199988] [2021-04-15 04:02:39,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:02:39,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:39,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:02:39,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:02:39,825 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:40,890 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-04-15 04:02:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:02:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:40,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:40,892 INFO L225 Difference]: With dead ends: 599 [2021-04-15 04:02:40,892 INFO L226 Difference]: Without dead ends: 551 [2021-04-15 04:02:40,892 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:02:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-04-15 04:02:40,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-04-15 04:02:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-04-15 04:02:40,898 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-04-15 04:02:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:40,898 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-04-15 04:02:40,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-04-15 04:02:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:40,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:40,899 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:41,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:41,113 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:41,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2112216365, now seen corresponding path program 25 times [2021-04-15 04:02:41,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:41,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226162947] [2021-04-15 04:02:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:41,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226162947] [2021-04-15 04:02:41,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218819602] [2021-04-15 04:02:41,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:41,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:41,590 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:02:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:02:41,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:41,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:41,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:41,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:02:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:41,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:41,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-04-15 04:02:41,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006407582] [2021-04-15 04:02:41,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:02:41,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:41,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:02:41,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:02:41,700 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:42,809 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-04-15 04:02:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:02:42,810 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:42,811 INFO L225 Difference]: With dead ends: 637 [2021-04-15 04:02:42,811 INFO L226 Difference]: Without dead ends: 589 [2021-04-15 04:02:42,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:02:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-04-15 04:02:42,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-04-15 04:02:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-04-15 04:02:42,818 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-04-15 04:02:42,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:42,818 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-04-15 04:02:42,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:42,818 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-04-15 04:02:42,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:42,819 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:42,819 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:43,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 04:02:43,026 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1541640341, now seen corresponding path program 26 times [2021-04-15 04:02:43,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:43,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318440821] [2021-04-15 04:02:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:43,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318440821] [2021-04-15 04:02:43,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085516453] [2021-04-15 04:02:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:43,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:43,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:43,457 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:02:43,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:02:43,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:43,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:43,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:43,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:02:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:43,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:43,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-04-15 04:02:43,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566931665] [2021-04-15 04:02:43,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:02:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:02:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:02:43,604 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:44,926 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-04-15 04:02:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:02:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:44,928 INFO L225 Difference]: With dead ends: 678 [2021-04-15 04:02:44,928 INFO L226 Difference]: Without dead ends: 646 [2021-04-15 04:02:44,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1122.1ms TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:02:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-04-15 04:02:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-04-15 04:02:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-04-15 04:02:44,935 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-04-15 04:02:44,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:44,935 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-04-15 04:02:44,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-04-15 04:02:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:44,936 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:44,937 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:45,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:45,169 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:45,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:45,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1327084589, now seen corresponding path program 27 times [2021-04-15 04:02:45,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:45,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318838342] [2021-04-15 04:02:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:45,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318838342] [2021-04-15 04:02:45,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600424373] [2021-04-15 04:02:45,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:45,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:02:45,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:45,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:45,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:02:45,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:02:45,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:45,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:45,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:45,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:02:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:45,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:45,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-04-15 04:02:45,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019056931] [2021-04-15 04:02:45,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-04-15 04:02:45,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-04-15 04:02:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-04-15 04:02:45,759 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:47,496 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-04-15 04:02:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:02:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:47,498 INFO L225 Difference]: With dead ends: 758 [2021-04-15 04:02:47,498 INFO L226 Difference]: Without dead ends: 714 [2021-04-15 04:02:47,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1285.9ms TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 04:02:47,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-04-15 04:02:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-04-15 04:02:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:47,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-04-15 04:02:47,505 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-04-15 04:02:47,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:47,505 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-04-15 04:02:47,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:47,505 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-04-15 04:02:47,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:47,506 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:47,506 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:47,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 04:02:47,721 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:47,722 INFO L82 PathProgramCache]: Analyzing trace with hash -293375473, now seen corresponding path program 28 times [2021-04-15 04:02:47,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:47,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965992795] [2021-04-15 04:02:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965992795] [2021-04-15 04:02:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379011696] [2021-04-15 04:02:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:47,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:47,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:48,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:48,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:02:48,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:48,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:48,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:48,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:02:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:48,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:48,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:02:48,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536986086] [2021-04-15 04:02:48,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:02:48,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:02:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:02:48,379 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:49,321 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-04-15 04:02:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:02:49,321 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:49,323 INFO L225 Difference]: With dead ends: 566 [2021-04-15 04:02:49,323 INFO L226 Difference]: Without dead ends: 538 [2021-04-15 04:02:49,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:02:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-04-15 04:02:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-04-15 04:02:49,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-04-15 04:02:49,329 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-04-15 04:02:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:49,329 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-04-15 04:02:49,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-04-15 04:02:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:49,330 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:49,330 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:49,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:49,537 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1738305687, now seen corresponding path program 29 times [2021-04-15 04:02:49,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:49,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21854012] [2021-04-15 04:02:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:49,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21854012] [2021-04-15 04:02:49,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269834495] [2021-04-15 04:02:49,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:49,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:02:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:49,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:02:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:50,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:50,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:02:50,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:50,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:50,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:50,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-04-15 04:02:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:50,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:50,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:02:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311808128] [2021-04-15 04:02:50,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:02:50,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:50,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:02:50,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:02:50,199 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:51,215 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-04-15 04:02:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:02:51,215 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:51,217 INFO L225 Difference]: With dead ends: 581 [2021-04-15 04:02:51,217 INFO L226 Difference]: Without dead ends: 533 [2021-04-15 04:02:51,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 883.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:02:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-04-15 04:02:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-04-15 04:02:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-04-15 04:02:51,223 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-04-15 04:02:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:51,223 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-04-15 04:02:51,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-04-15 04:02:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:51,224 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:51,224 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:51,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 04:02:51,439 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1277289895, now seen corresponding path program 30 times [2021-04-15 04:02:51,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:51,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27824130] [2021-04-15 04:02:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:51,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27824130] [2021-04-15 04:02:51,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728254712] [2021-04-15 04:02:51,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:51,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:02:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:52,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:52,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:02:52,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:52,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:52,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:52,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:02:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:52,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:52,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:02:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650541693] [2021-04-15 04:02:52,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:02:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:52,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:02:52,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:02:52,156 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:53,245 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-04-15 04:02:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:02:53,246 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:53,248 INFO L225 Difference]: With dead ends: 618 [2021-04-15 04:02:53,248 INFO L226 Difference]: Without dead ends: 570 [2021-04-15 04:02:53,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 947.8ms TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:02:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-04-15 04:02:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-04-15 04:02:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-04-15 04:02:53,254 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-04-15 04:02:53,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:53,254 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-04-15 04:02:53,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-04-15 04:02:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:53,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:53,255 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:53,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 04:02:53,463 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 108332695, now seen corresponding path program 31 times [2021-04-15 04:02:53,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:53,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224537918] [2021-04-15 04:02:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:53,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224537918] [2021-04-15 04:02:53,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118670528] [2021-04-15 04:02:53,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:53,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:54,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:54,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:02:54,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:54,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:54,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:54,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:02:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:54,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:54,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:02:54,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144122664] [2021-04-15 04:02:54,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:02:54,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:02:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:02:54,164 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:55,323 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-04-15 04:02:55,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:02:55,324 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:55,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:55,326 INFO L225 Difference]: With dead ends: 656 [2021-04-15 04:02:55,326 INFO L226 Difference]: Without dead ends: 608 [2021-04-15 04:02:55,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1010.1ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:02:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-04-15 04:02:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-04-15 04:02:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-04-15 04:02:55,332 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-04-15 04:02:55,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:55,332 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-04-15 04:02:55,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-04-15 04:02:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:55,333 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:55,333 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:55,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 04:02:55,541 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -532777895, now seen corresponding path program 32 times [2021-04-15 04:02:55,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:55,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081943935] [2021-04-15 04:02:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:55,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081943935] [2021-04-15 04:02:55,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25111380] [2021-04-15 04:02:55,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:55,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:55,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:56,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:56,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:56,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:02:56,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:56,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:56,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:56,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:02:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:56,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:56,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:02:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967569356] [2021-04-15 04:02:56,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:02:56,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:56,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:02:56,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:02:56,215 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:57,486 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-04-15 04:02:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:02:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:57,489 INFO L225 Difference]: With dead ends: 689 [2021-04-15 04:02:57,489 INFO L226 Difference]: Without dead ends: 657 [2021-04-15 04:02:57,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1065.1ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:02:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-04-15 04:02:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-04-15 04:02:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-04-15 04:02:57,495 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-04-15 04:02:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:57,495 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-04-15 04:02:57,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-04-15 04:02:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:57,496 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:57,496 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:57,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 04:02:57,697 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:57,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash 893464471, now seen corresponding path program 33 times [2021-04-15 04:02:57,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:57,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398062057] [2021-04-15 04:02:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:57,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398062057] [2021-04-15 04:02:57,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363802299] [2021-04-15 04:02:57,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:57,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:02:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:57,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:02:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:02:58,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:02:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:02:58,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:02:58,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:02:58,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:02:58,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:02:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:58,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:58,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:02:58,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497918959] [2021-04-15 04:02:58,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:02:58,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:58,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:02:58,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:02:58,380 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:59,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:59,946 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-04-15 04:02:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:02:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:02:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:59,948 INFO L225 Difference]: With dead ends: 757 [2021-04-15 04:02:59,948 INFO L226 Difference]: Without dead ends: 713 [2021-04-15 04:02:59,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1262.3ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:02:59,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-04-15 04:02:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-04-15 04:02:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-04-15 04:02:59,955 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-04-15 04:02:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:59,955 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-04-15 04:02:59,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-04-15 04:02:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:02:59,956 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:59,956 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:00,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:00,172 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:00,172 INFO L82 PathProgramCache]: Analyzing trace with hash 255748759, now seen corresponding path program 34 times [2021-04-15 04:03:00,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:00,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809460831] [2021-04-15 04:03:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809460831] [2021-04-15 04:03:00,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021409460] [2021-04-15 04:03:00,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:00,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:03:00,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:00,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:00,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:00,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:00,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:00,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:00,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:00,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:00,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:03:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:00,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:00,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:00,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557246833] [2021-04-15 04:03:00,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:00,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:00,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:00,832 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:01,822 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-04-15 04:03:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:03:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:01,825 INFO L225 Difference]: With dead ends: 579 [2021-04-15 04:03:01,825 INFO L226 Difference]: Without dead ends: 551 [2021-04-15 04:03:01,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 912.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:03:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-04-15 04:03:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-04-15 04:03:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-04-15 04:03:01,830 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-04-15 04:03:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:01,830 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-04-15 04:03:01,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-04-15 04:03:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:01,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:01,831 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:02,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-04-15 04:03:02,037 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1562594731, now seen corresponding path program 35 times [2021-04-15 04:03:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:02,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87075586] [2021-04-15 04:03:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:02,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87075586] [2021-04-15 04:03:02,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558533223] [2021-04-15 04:03:02,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:02,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:03:02,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:02,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:03:02,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:02,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:02,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:03:02,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:02,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:02,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:02,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-04-15 04:03:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:02,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:02,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:02,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052368028] [2021-04-15 04:03:02,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:02,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:02,703 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:03,524 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-04-15 04:03:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:03:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:03,526 INFO L225 Difference]: With dead ends: 557 [2021-04-15 04:03:03,526 INFO L226 Difference]: Without dead ends: 509 [2021-04-15 04:03:03,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 04:03:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-04-15 04:03:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-04-15 04:03:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-04-15 04:03:03,532 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-04-15 04:03:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:03,532 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-04-15 04:03:03,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-04-15 04:03:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:03,533 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:03,533 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:03,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 04:03:03,734 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash -176972141, now seen corresponding path program 36 times [2021-04-15 04:03:03,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:03,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265120749] [2021-04-15 04:03:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:04,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265120749] [2021-04-15 04:03:04,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760907507] [2021-04-15 04:03:04,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:04,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:03:04,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:03:04,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:04,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:04,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:04,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:04,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:04,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:04,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:04,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:04,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:04,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:04,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214573333] [2021-04-15 04:03:04,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:04,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:04,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:04,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:04,422 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:05,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:05,507 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-04-15 04:03:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:03:05,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:05,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:05,509 INFO L225 Difference]: With dead ends: 562 [2021-04-15 04:03:05,509 INFO L226 Difference]: Without dead ends: 518 [2021-04-15 04:03:05,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:03:05,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-04-15 04:03:05,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-04-15 04:03:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-04-15 04:03:05,514 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-04-15 04:03:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:05,515 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-04-15 04:03:05,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-04-15 04:03:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:05,516 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:05,516 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:05,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:05,729 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:05,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash -818082731, now seen corresponding path program 37 times [2021-04-15 04:03:05,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:05,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900138133] [2021-04-15 04:03:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:06,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900138133] [2021-04-15 04:03:06,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299836620] [2021-04-15 04:03:06,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:03:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:06,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:06,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:06,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:06,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:06,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:06,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:06,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:06,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342399844] [2021-04-15 04:03:06,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:06,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:06,416 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:07,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:07,552 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-04-15 04:03:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:03:07,553 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:07,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:07,554 INFO L225 Difference]: With dead ends: 596 [2021-04-15 04:03:07,554 INFO L226 Difference]: Without dead ends: 564 [2021-04-15 04:03:07,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:03:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-04-15 04:03:07,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-04-15 04:03:07,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-04-15 04:03:07,560 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-04-15 04:03:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:07,560 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-04-15 04:03:07,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-04-15 04:03:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:07,561 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:07,561 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:07,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 04:03:07,776 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash 608159635, now seen corresponding path program 38 times [2021-04-15 04:03:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:07,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631072193] [2021-04-15 04:03:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:08,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631072193] [2021-04-15 04:03:08,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179583119] [2021-04-15 04:03:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:08,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:03:08,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:08,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:08,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:08,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:08,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:08,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:08,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:08,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:08,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:08,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151591057] [2021-04-15 04:03:08,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:08,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:08,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:08,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:08,462 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:10,213 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-04-15 04:03:10,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:03:10,213 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:10,215 INFO L225 Difference]: With dead ends: 658 [2021-04-15 04:03:10,215 INFO L226 Difference]: Without dead ends: 610 [2021-04-15 04:03:10,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1340.1ms TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:03:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-04-15 04:03:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-04-15 04:03:10,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-04-15 04:03:10,220 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-04-15 04:03:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:10,220 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-04-15 04:03:10,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-04-15 04:03:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:10,223 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:10,223 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:10,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:10,433 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash -306473111, now seen corresponding path program 39 times [2021-04-15 04:03:10,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:10,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552973875] [2021-04-15 04:03:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:10,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552973875] [2021-04-15 04:03:10,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014191182] [2021-04-15 04:03:10,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:10,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:03:10,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:10,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:10,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:10,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:10,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:10,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:10,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:10,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:10,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:03:11,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:11,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:11,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:11,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036191291] [2021-04-15 04:03:11,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:11,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:11,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:11,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:11,103 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:12,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:12,224 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-04-15 04:03:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:03:12,225 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:12,226 INFO L225 Difference]: With dead ends: 556 [2021-04-15 04:03:12,226 INFO L226 Difference]: Without dead ends: 528 [2021-04-15 04:03:12,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1066.8ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:03:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-04-15 04:03:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-04-15 04:03:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-04-15 04:03:12,232 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-04-15 04:03:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:12,232 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-04-15 04:03:12,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-04-15 04:03:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:12,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:12,260 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:12,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 04:03:12,461 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:12,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1502778699, now seen corresponding path program 40 times [2021-04-15 04:03:12,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:12,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293384044] [2021-04-15 04:03:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:12,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293384044] [2021-04-15 04:03:12,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277573534] [2021-04-15 04:03:12,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:03:12,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:03:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:13,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:13,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:13,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:13,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:13,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:13,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:13,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:13,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:13,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:13,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003202068] [2021-04-15 04:03:13,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:13,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:13,159 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:14,229 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-04-15 04:03:14,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:03:14,229 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:14,231 INFO L225 Difference]: With dead ends: 607 [2021-04-15 04:03:14,231 INFO L226 Difference]: Without dead ends: 559 [2021-04-15 04:03:14,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 04:03:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-04-15 04:03:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-04-15 04:03:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-04-15 04:03:14,237 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-04-15 04:03:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:14,237 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-04-15 04:03:14,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-04-15 04:03:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:14,238 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:14,238 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:14,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:14,445 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:14,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1512816883, now seen corresponding path program 41 times [2021-04-15 04:03:14,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:14,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707824730] [2021-04-15 04:03:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:14,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707824730] [2021-04-15 04:03:14,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391189566] [2021-04-15 04:03:14,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:14,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:03:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:14,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:15,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:15,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:15,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:15,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:03:15,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:15,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:15,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:15,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-04-15 04:03:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:15,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:15,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-04-15 04:03:15,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482479387] [2021-04-15 04:03:15,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:03:15,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:03:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:03:15,253 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:16,466 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-04-15 04:03:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:03:16,466 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:16,468 INFO L225 Difference]: With dead ends: 644 [2021-04-15 04:03:16,468 INFO L226 Difference]: Without dead ends: 596 [2021-04-15 04:03:16,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1053.3ms TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:03:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-04-15 04:03:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-04-15 04:03:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-04-15 04:03:16,474 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-04-15 04:03:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:16,474 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-04-15 04:03:16,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-04-15 04:03:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:16,475 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:16,475 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:16,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 04:03:16,675 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash -127194293, now seen corresponding path program 42 times [2021-04-15 04:03:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:16,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037321648] [2021-04-15 04:03:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:16,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037321648] [2021-04-15 04:03:16,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828708817] [2021-04-15 04:03:16,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:16,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:03:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:16,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:16,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:17,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:17,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:17,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:17,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:17,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:17,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:17,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:17,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:17,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921579046] [2021-04-15 04:03:17,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:17,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:17,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:17,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:17,374 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:18,777 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-04-15 04:03:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:03:18,778 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:18,780 INFO L225 Difference]: With dead ends: 682 [2021-04-15 04:03:18,780 INFO L226 Difference]: Without dead ends: 634 [2021-04-15 04:03:18,780 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1048.5ms TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:03:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-04-15 04:03:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-04-15 04:03:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:18,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-04-15 04:03:18,786 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-04-15 04:03:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:18,786 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-04-15 04:03:18,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-04-15 04:03:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:18,786 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:18,787 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:18,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 04:03:18,987 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:18,988 INFO L82 PathProgramCache]: Analyzing trace with hash -768304883, now seen corresponding path program 43 times [2021-04-15 04:03:18,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:18,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763382588] [2021-04-15 04:03:18,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:19,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763382588] [2021-04-15 04:03:19,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436102572] [2021-04-15 04:03:19,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:19,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:19,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:19,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:19,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:19,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:19,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:19,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:19,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:19,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872128665] [2021-04-15 04:03:19,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:19,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:19,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:19,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:19,711 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:21,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:21,117 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-04-15 04:03:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:03:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:21,120 INFO L225 Difference]: With dead ends: 715 [2021-04-15 04:03:21,120 INFO L226 Difference]: Without dead ends: 683 [2021-04-15 04:03:21,120 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1109.1ms TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 04:03:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-04-15 04:03:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-04-15 04:03:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-04-15 04:03:21,127 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-04-15 04:03:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:21,127 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-04-15 04:03:21,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-04-15 04:03:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:21,127 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:21,128 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:21,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:21,341 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash 657937483, now seen corresponding path program 44 times [2021-04-15 04:03:21,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:21,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695027282] [2021-04-15 04:03:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:21,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695027282] [2021-04-15 04:03:21,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020562526] [2021-04-15 04:03:21,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:21,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:03:21,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:21,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:21,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:21,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:21,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:21,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:21,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:21,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:21,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:22,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:22,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:22,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236686794] [2021-04-15 04:03:22,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:22,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:22,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:22,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:22,030 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:23,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:23,816 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-04-15 04:03:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:03:23,817 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:23,819 INFO L225 Difference]: With dead ends: 783 [2021-04-15 04:03:23,819 INFO L226 Difference]: Without dead ends: 739 [2021-04-15 04:03:23,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1305.2ms TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:03:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-04-15 04:03:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-04-15 04:03:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-04-15 04:03:23,825 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-04-15 04:03:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:23,825 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-04-15 04:03:23,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-04-15 04:03:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:23,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:23,826 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:24,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 04:03:24,027 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:24,027 INFO L82 PathProgramCache]: Analyzing trace with hash 20221771, now seen corresponding path program 45 times [2021-04-15 04:03:24,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:24,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538599581] [2021-04-15 04:03:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:24,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538599581] [2021-04-15 04:03:24,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932522950] [2021-04-15 04:03:24,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:24,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:03:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:24,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:24,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:24,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:24,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:24,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:24,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:24,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:03:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:24,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:24,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:24,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479253763] [2021-04-15 04:03:24,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:24,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:24,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:24,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:24,705 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:25,843 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-04-15 04:03:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:03:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:25,846 INFO L225 Difference]: With dead ends: 605 [2021-04-15 04:03:25,846 INFO L226 Difference]: Without dead ends: 577 [2021-04-15 04:03:25,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 965.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:03:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-04-15 04:03:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-04-15 04:03:25,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-04-15 04:03:25,851 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-04-15 04:03:25,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:25,851 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-04-15 04:03:25,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-04-15 04:03:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:25,852 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:25,852 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:26,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:26,061 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:26,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1798121719, now seen corresponding path program 46 times [2021-04-15 04:03:26,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:26,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372519446] [2021-04-15 04:03:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:26,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372519446] [2021-04-15 04:03:26,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119520592] [2021-04-15 04:03:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:26,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:03:26,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:26,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:26,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:26,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:26,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:26,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:26,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:26,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:26,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:26,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:26,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909871158] [2021-04-15 04:03:26,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:26,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:26,822 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:27,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:27,801 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-04-15 04:03:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:03:27,802 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:27,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:27,803 INFO L225 Difference]: With dead ends: 583 [2021-04-15 04:03:27,803 INFO L226 Difference]: Without dead ends: 535 [2021-04-15 04:03:27,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 04:03:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-04-15 04:03:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-04-15 04:03:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-04-15 04:03:27,809 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-04-15 04:03:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:27,809 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-04-15 04:03:27,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-04-15 04:03:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:27,810 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:27,810 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:28,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:28,021 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:28,021 INFO L82 PathProgramCache]: Analyzing trace with hash -412499129, now seen corresponding path program 47 times [2021-04-15 04:03:28,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:28,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120687225] [2021-04-15 04:03:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:28,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120687225] [2021-04-15 04:03:28,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278359183] [2021-04-15 04:03:28,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:28,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:03:28,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:03:28,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:28,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:28,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:28,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:03:28,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:28,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:28,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:28,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-04-15 04:03:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:28,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:28,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:28,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190312019] [2021-04-15 04:03:28,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:28,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:28,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:28,737 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:30,430 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-04-15 04:03:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:03:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:30,432 INFO L225 Difference]: With dead ends: 708 [2021-04-15 04:03:30,432 INFO L226 Difference]: Without dead ends: 613 [2021-04-15 04:03:30,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1437.3ms TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:03:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-04-15 04:03:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-04-15 04:03:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-04-15 04:03:30,438 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-04-15 04:03:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:30,438 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-04-15 04:03:30,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-04-15 04:03:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:30,439 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:30,439 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:30,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 04:03:30,653 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:30,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:30,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1053609719, now seen corresponding path program 48 times [2021-04-15 04:03:30,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:30,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338442320] [2021-04-15 04:03:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:30,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338442320] [2021-04-15 04:03:30,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125618734] [2021-04-15 04:03:30,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:30,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:03:30,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:30,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:31,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:31,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:31,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:31,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:31,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:31,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:31,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:31,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208621426] [2021-04-15 04:03:31,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:31,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:31,385 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:33,156 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-04-15 04:03:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:03:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:33,157 INFO L225 Difference]: With dead ends: 736 [2021-04-15 04:03:33,157 INFO L226 Difference]: Without dead ends: 668 [2021-04-15 04:03:33,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1519.4ms TimeCoverageRelationStatistics Valid=414, Invalid=3368, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:03:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-04-15 04:03:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-04-15 04:03:33,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-04-15 04:03:33,164 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-04-15 04:03:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:33,164 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-04-15 04:03:33,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-04-15 04:03:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:33,164 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:33,164 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:33,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:33,380 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:33,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:33,380 INFO L82 PathProgramCache]: Analyzing trace with hash 372632647, now seen corresponding path program 49 times [2021-04-15 04:03:33,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:33,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939630292] [2021-04-15 04:03:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:33,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939630292] [2021-04-15 04:03:33,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605983656] [2021-04-15 04:03:33,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:33,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:33,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:33,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:33,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:33,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:33,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:33,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:33,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:33,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:34,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:34,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:34,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136399514] [2021-04-15 04:03:34,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:34,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:34,128 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:36,634 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-04-15 04:03:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 04:03:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:36,635 INFO L225 Difference]: With dead ends: 829 [2021-04-15 04:03:36,635 INFO L226 Difference]: Without dead ends: 753 [2021-04-15 04:03:36,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1870.1ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:03:36,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-04-15 04:03:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-04-15 04:03:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-04-15 04:03:36,644 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-04-15 04:03:36,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:36,645 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-04-15 04:03:36,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-04-15 04:03:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:36,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:36,645 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:36,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 04:03:36,846 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -542000099, now seen corresponding path program 50 times [2021-04-15 04:03:36,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:36,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083420098] [2021-04-15 04:03:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:37,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083420098] [2021-04-15 04:03:37,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582615312] [2021-04-15 04:03:37,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:37,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:03:37,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:37,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:37,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:37,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:37,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:37,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:37,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:03:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:37,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771009667] [2021-04-15 04:03:37,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:37,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:37,686 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:39,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:39,266 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-04-15 04:03:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:03:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:39,268 INFO L225 Difference]: With dead ends: 652 [2021-04-15 04:03:39,268 INFO L226 Difference]: Without dead ends: 596 [2021-04-15 04:03:39,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1460.2ms TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:03:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-04-15 04:03:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-04-15 04:03:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-04-15 04:03:39,275 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-04-15 04:03:39,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:39,275 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-04-15 04:03:39,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-04-15 04:03:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:39,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:39,275 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:39,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 04:03:39,489 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2125436613, now seen corresponding path program 51 times [2021-04-15 04:03:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651240069] [2021-04-15 04:03:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651240069] [2021-04-15 04:03:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026303676] [2021-04-15 04:03:39,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:39,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:03:39,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:39,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:40,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:40,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:40,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:40,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:40,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:40,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:40,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:40,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:40,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224919115] [2021-04-15 04:03:40,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:40,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:40,272 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:41,295 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-04-15 04:03:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:03:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:41,297 INFO L225 Difference]: With dead ends: 637 [2021-04-15 04:03:41,297 INFO L226 Difference]: Without dead ends: 589 [2021-04-15 04:03:41,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1012.1ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 04:03:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-04-15 04:03:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-04-15 04:03:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-04-15 04:03:41,303 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-04-15 04:03:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:41,304 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-04-15 04:03:41,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-04-15 04:03:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:41,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:41,304 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:41,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 04:03:41,505 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:41,506 INFO L82 PathProgramCache]: Analyzing trace with hash -739814023, now seen corresponding path program 52 times [2021-04-15 04:03:41,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:41,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401744808] [2021-04-15 04:03:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401744808] [2021-04-15 04:03:41,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675667372] [2021-04-15 04:03:41,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:41,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:03:41,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:41,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:41,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:42,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:42,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:42,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:42,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:42,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:42,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:42,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:42,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204274177] [2021-04-15 04:03:42,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:42,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:42,267 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:43,982 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-04-15 04:03:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:03:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:43,985 INFO L225 Difference]: With dead ends: 764 [2021-04-15 04:03:43,985 INFO L226 Difference]: Without dead ends: 669 [2021-04-15 04:03:43,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1513.1ms TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:03:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-04-15 04:03:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-04-15 04:03:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-04-15 04:03:43,991 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-04-15 04:03:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:43,991 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-04-15 04:03:43,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-04-15 04:03:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:43,992 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:43,992 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:44,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 04:03:44,193 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1380924613, now seen corresponding path program 53 times [2021-04-15 04:03:44,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:44,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594020032] [2021-04-15 04:03:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:44,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:44,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594020032] [2021-04-15 04:03:44,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78220297] [2021-04-15 04:03:44,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:44,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:03:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:44,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:44,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:44,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:44,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:44,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:44,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:44,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:44,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:44,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:44,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302714946] [2021-04-15 04:03:44,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:44,895 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:47,078 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-04-15 04:03:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:03:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:47,080 INFO L225 Difference]: With dead ends: 788 [2021-04-15 04:03:47,080 INFO L226 Difference]: Without dead ends: 720 [2021-04-15 04:03:47,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1650.6ms TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:03:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-04-15 04:03:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-04-15 04:03:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-04-15 04:03:47,087 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-04-15 04:03:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:47,087 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-04-15 04:03:47,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-04-15 04:03:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:47,088 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:47,088 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:47,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:47,304 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash 45317753, now seen corresponding path program 54 times [2021-04-15 04:03:47,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:47,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623852025] [2021-04-15 04:03:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:47,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623852025] [2021-04-15 04:03:47,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966405524] [2021-04-15 04:03:47,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:47,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:03:47,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:03:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:47,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:47,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:47,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:47,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:47,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:47,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:48,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:48,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:48,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850307921] [2021-04-15 04:03:48,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:48,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:48,022 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:50,981 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-04-15 04:03:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-04-15 04:03:50,982 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:50,983 INFO L225 Difference]: With dead ends: 888 [2021-04-15 04:03:50,983 INFO L226 Difference]: Without dead ends: 812 [2021-04-15 04:03:50,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2114.3ms TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-04-15 04:03:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-04-15 04:03:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-04-15 04:03:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-04-15 04:03:50,990 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-04-15 04:03:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:50,990 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-04-15 04:03:50,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-04-15 04:03:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:50,991 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:50,991 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:51,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:51,192 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash -869314993, now seen corresponding path program 55 times [2021-04-15 04:03:51,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:51,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719016851] [2021-04-15 04:03:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719016851] [2021-04-15 04:03:51,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611018132] [2021-04-15 04:03:51,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:51,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:51,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:51,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:51,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:51,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:51,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:51,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:51,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:51,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:03:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:51,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:51,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411539995] [2021-04-15 04:03:51,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:51,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:51,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:51,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:51,972 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:53,586 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-04-15 04:03:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:03:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:53,588 INFO L225 Difference]: With dead ends: 715 [2021-04-15 04:03:53,588 INFO L226 Difference]: Without dead ends: 659 [2021-04-15 04:03:53,588 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1481.4ms TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-04-15 04:03:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-04-15 04:03:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-04-15 04:03:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-04-15 04:03:53,594 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-04-15 04:03:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:53,594 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-04-15 04:03:53,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-04-15 04:03:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:53,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:53,595 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:53,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:53,796 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash -865898715, now seen corresponding path program 56 times [2021-04-15 04:03:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:53,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868501227] [2021-04-15 04:03:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:54,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868501227] [2021-04-15 04:03:54,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148614601] [2021-04-15 04:03:54,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:03:54,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:03:54,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:54,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:54,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:54,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:54,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:54,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:54,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:54,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:54,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:54,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:54,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:54,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986813881] [2021-04-15 04:03:54,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:54,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:54,605 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:56,721 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-04-15 04:03:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:03:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:56,723 INFO L225 Difference]: With dead ends: 766 [2021-04-15 04:03:56,723 INFO L226 Difference]: Without dead ends: 678 [2021-04-15 04:03:56,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1845.1ms TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:03:56,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-04-15 04:03:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-04-15 04:03:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-04-15 04:03:56,729 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-04-15 04:03:56,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:56,729 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-04-15 04:03:56,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-04-15 04:03:56,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:56,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:56,730 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:56,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 04:03:56,931 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:56,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:56,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1507009305, now seen corresponding path program 57 times [2021-04-15 04:03:56,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:56,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383627693] [2021-04-15 04:03:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:57,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383627693] [2021-04-15 04:03:57,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81307791] [2021-04-15 04:03:57,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:57,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:03:57,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:57,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:03:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:57,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:57,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:03:57,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:03:57,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:03:57,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:03:57,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:03:57,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:03:57,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:03:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:57,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:57,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:03:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317251220] [2021-04-15 04:03:57,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:03:57,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:03:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:03:57,646 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:59,536 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-04-15 04:03:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:03:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:03:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:59,538 INFO L225 Difference]: With dead ends: 771 [2021-04-15 04:03:59,538 INFO L226 Difference]: Without dead ends: 707 [2021-04-15 04:03:59,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1748.5ms TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:03:59,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-04-15 04:03:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-04-15 04:03:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-04-15 04:03:59,544 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-04-15 04:03:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:59,544 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-04-15 04:03:59,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-04-15 04:03:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:03:59,545 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:59,545 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:59,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:59,746 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:59,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:59,746 INFO L82 PathProgramCache]: Analyzing trace with hash -80766939, now seen corresponding path program 58 times [2021-04-15 04:03:59,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:59,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811698636] [2021-04-15 04:03:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:00,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811698636] [2021-04-15 04:04:00,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842565028] [2021-04-15 04:04:00,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:00,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:04:00,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:00,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:00,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:00,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:00,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:00,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:00,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:00,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:00,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:00,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:00,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:00,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:04:00,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093882661] [2021-04-15 04:04:00,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:04:00,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:00,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:04:00,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:04:00,450 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:02,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:02,834 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-04-15 04:04:02,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 04:04:02,835 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:02,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:02,836 INFO L225 Difference]: With dead ends: 823 [2021-04-15 04:04:02,836 INFO L226 Difference]: Without dead ends: 767 [2021-04-15 04:04:02,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1973.6ms TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 04:04:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-04-15 04:04:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-04-15 04:04:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-04-15 04:04:02,843 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-04-15 04:04:02,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:02,843 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-04-15 04:04:02,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-04-15 04:04:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:02,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:02,844 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:03,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-04-15 04:04:03,045 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash -185613557, now seen corresponding path program 59 times [2021-04-15 04:04:03,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:03,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125672801] [2021-04-15 04:04:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125672801] [2021-04-15 04:04:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122589566] [2021-04-15 04:04:03,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:03,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:04:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:03,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:03,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:03,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:03,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:03,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:03,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:03,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:03,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:03,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:04:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:03,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:03,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-04-15 04:04:03,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114610253] [2021-04-15 04:04:03,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:04:03,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:03,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:04:03,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:04:03,763 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:05,520 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-04-15 04:04:05,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:04:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:05,522 INFO L225 Difference]: With dead ends: 729 [2021-04-15 04:04:05,522 INFO L226 Difference]: Without dead ends: 673 [2021-04-15 04:04:05,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1555.7ms TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 04:04:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-04-15 04:04:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-04-15 04:04:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-04-15 04:04:05,528 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-04-15 04:04:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:05,528 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-04-15 04:04:05,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:05,528 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-04-15 04:04:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:05,529 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:05,529 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:05,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:05,730 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -931000177, now seen corresponding path program 60 times [2021-04-15 04:04:05,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:05,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194297165] [2021-04-15 04:04:05,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194297165] [2021-04-15 04:04:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143210177] [2021-04-15 04:04:05,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:06,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:04:06,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:06,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:04:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:06,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:06,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:06,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:04:06,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:06,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:06,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:06,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-04-15 04:04:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:06,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:06,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:06,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61936623] [2021-04-15 04:04:06,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:06,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:06,504 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:07,451 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-04-15 04:04:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:04:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:07,453 INFO L225 Difference]: With dead ends: 722 [2021-04-15 04:04:07,453 INFO L226 Difference]: Without dead ends: 674 [2021-04-15 04:04:07,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1049.2ms TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:04:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-04-15 04:04:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-04-15 04:04:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-04-15 04:04:07,460 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-04-15 04:04:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:07,460 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-04-15 04:04:07,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-04-15 04:04:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:07,461 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:07,461 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:07,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-04-15 04:04:07,663 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:07,664 INFO L82 PathProgramCache]: Analyzing trace with hash 348371537, now seen corresponding path program 61 times [2021-04-15 04:04:07,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:07,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719664968] [2021-04-15 04:04:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:07,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719664968] [2021-04-15 04:04:07,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547727656] [2021-04-15 04:04:07,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 04:04:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:08,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:08,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:08,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:08,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:08,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:08,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:08,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:08,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:08,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:08,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:08,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117042002] [2021-04-15 04:04:08,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:08,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:08,567 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:09,700 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-04-15 04:04:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:04:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:09,702 INFO L225 Difference]: With dead ends: 759 [2021-04-15 04:04:09,702 INFO L226 Difference]: Without dead ends: 711 [2021-04-15 04:04:09,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1119.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-04-15 04:04:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-04-15 04:04:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-04-15 04:04:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-04-15 04:04:09,708 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-04-15 04:04:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:09,708 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-04-15 04:04:09,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-04-15 04:04:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:09,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:09,709 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:09,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:09,910 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:09,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1733994127, now seen corresponding path program 62 times [2021-04-15 04:04:09,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:09,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410574640] [2021-04-15 04:04:09,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410574640] [2021-04-15 04:04:10,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167767843] [2021-04-15 04:04:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:10,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:04:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:10,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:10,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:10,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:10,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:10,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:10,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:10,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:10,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:10,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:10,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:10,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:10,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294981252] [2021-04-15 04:04:10,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:10,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:10,702 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:12,018 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-04-15 04:04:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:04:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:12,020 INFO L225 Difference]: With dead ends: 797 [2021-04-15 04:04:12,020 INFO L226 Difference]: Without dead ends: 749 [2021-04-15 04:04:12,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1176.1ms TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:04:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-04-15 04:04:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-04-15 04:04:12,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-04-15 04:04:12,026 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-04-15 04:04:12,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:12,026 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-04-15 04:04:12,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-04-15 04:04:12,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:12,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:12,027 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:12,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 04:04:12,228 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:12,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1092883537, now seen corresponding path program 63 times [2021-04-15 04:04:12,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:12,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914476861] [2021-04-15 04:04:12,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:12,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914476861] [2021-04-15 04:04:12,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526809106] [2021-04-15 04:04:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:12,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:04:12,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:12,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:12,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:12,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:12,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:12,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:12,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:12,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:12,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:12,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980040268] [2021-04-15 04:04:12,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:12,997 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:14,541 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-04-15 04:04:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:04:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:14,543 INFO L225 Difference]: With dead ends: 830 [2021-04-15 04:04:14,543 INFO L226 Difference]: Without dead ends: 798 [2021-04-15 04:04:14,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1237.9ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-04-15 04:04:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-04-15 04:04:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-04-15 04:04:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-04-15 04:04:14,550 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-04-15 04:04:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:14,550 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-04-15 04:04:14,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:14,550 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-04-15 04:04:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:14,551 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:14,551 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:14,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-04-15 04:04:14,765 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1775841393, now seen corresponding path program 64 times [2021-04-15 04:04:14,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:14,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319057897] [2021-04-15 04:04:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:15,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319057897] [2021-04-15 04:04:15,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572135422] [2021-04-15 04:04:15,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:15,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:04:15,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:15,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:15,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:15,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:15,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:15,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:15,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:15,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:15,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:15,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:15,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:15,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856274225] [2021-04-15 04:04:15,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:15,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:15,549 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:17,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:17,492 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-04-15 04:04:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:04:17,493 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:17,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:17,494 INFO L225 Difference]: With dead ends: 897 [2021-04-15 04:04:17,494 INFO L226 Difference]: Without dead ends: 853 [2021-04-15 04:04:17,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1446.1ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:04:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-04-15 04:04:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-04-15 04:04:17,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-04-15 04:04:17,502 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-04-15 04:04:17,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:17,502 INFO L480 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-04-15 04:04:17,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:17,502 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-04-15 04:04:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:17,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:17,503 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:17,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:17,717 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1881410191, now seen corresponding path program 65 times [2021-04-15 04:04:17,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:17,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010273246] [2021-04-15 04:04:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:17,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010273246] [2021-04-15 04:04:17,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587366903] [2021-04-15 04:04:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:18,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:04:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:18,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:18,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:18,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:18,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:18,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:04:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:18,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:18,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:18,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461489937] [2021-04-15 04:04:18,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:18,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:18,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:18,487 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:19,500 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-04-15 04:04:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:04:19,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:19,501 INFO L225 Difference]: With dead ends: 720 [2021-04-15 04:04:19,501 INFO L226 Difference]: Without dead ends: 692 [2021-04-15 04:04:19,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1086.0ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:04:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-04-15 04:04:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-04-15 04:04:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-04-15 04:04:19,508 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-04-15 04:04:19,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:19,508 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-04-15 04:04:19,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:19,508 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-04-15 04:04:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:19,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:19,509 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:19,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:19,710 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:19,710 INFO L82 PathProgramCache]: Analyzing trace with hash 63066701, now seen corresponding path program 66 times [2021-04-15 04:04:19,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:19,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750150558] [2021-04-15 04:04:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750150558] [2021-04-15 04:04:19,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349847726] [2021-04-15 04:04:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:20,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:04:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:20,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:04:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:20,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:20,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:20,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:20,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:20,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:20,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:20,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458450379] [2021-04-15 04:04:20,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:20,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:20,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:20,498 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:21,787 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-04-15 04:04:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:04:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:21,789 INFO L225 Difference]: With dead ends: 760 [2021-04-15 04:04:21,789 INFO L226 Difference]: Without dead ends: 664 [2021-04-15 04:04:21,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1344.8ms TimeCoverageRelationStatistics Valid=277, Invalid=2915, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:04:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-04-15 04:04:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-04-15 04:04:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-04-15 04:04:21,796 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-04-15 04:04:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:21,796 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-04-15 04:04:21,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-04-15 04:04:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:21,797 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:21,797 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:22,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-04-15 04:04:22,009 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1448689291, now seen corresponding path program 67 times [2021-04-15 04:04:22,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:22,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491313046] [2021-04-15 04:04:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:22,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491313046] [2021-04-15 04:04:22,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797394421] [2021-04-15 04:04:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:22,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:22,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:22,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:22,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:22,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:22,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:22,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:22,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:22,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967685029] [2021-04-15 04:04:22,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:22,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:22,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:22,831 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:24,661 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-04-15 04:04:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-04-15 04:04:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:24,663 INFO L225 Difference]: With dead ends: 806 [2021-04-15 04:04:24,663 INFO L226 Difference]: Without dead ends: 711 [2021-04-15 04:04:24,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1598.6ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:04:24,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-04-15 04:04:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-04-15 04:04:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-04-15 04:04:24,670 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-04-15 04:04:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:24,670 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-04-15 04:04:24,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-04-15 04:04:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:24,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:24,671 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:24,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:24,877 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash 807578701, now seen corresponding path program 68 times [2021-04-15 04:04:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:24,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920832887] [2021-04-15 04:04:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920832887] [2021-04-15 04:04:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682571227] [2021-04-15 04:04:25,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:25,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:04:25,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:25,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:25,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:25,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:25,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:25,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:25,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:25,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:25,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:25,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:25,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:25,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:25,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:25,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135994087] [2021-04-15 04:04:25,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:25,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:25,650 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:27,576 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-04-15 04:04:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:04:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:27,577 INFO L225 Difference]: With dead ends: 830 [2021-04-15 04:04:27,578 INFO L226 Difference]: Without dead ends: 762 [2021-04-15 04:04:27,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1605.2ms TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 04:04:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-04-15 04:04:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-04-15 04:04:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-04-15 04:04:27,584 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-04-15 04:04:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:27,585 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-04-15 04:04:27,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-04-15 04:04:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:27,585 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:27,586 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:27,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 04:04:27,801 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2061146229, now seen corresponding path program 69 times [2021-04-15 04:04:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:27,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111102528] [2021-04-15 04:04:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:28,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111102528] [2021-04-15 04:04:28,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113349954] [2021-04-15 04:04:28,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:28,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:04:28,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:28,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:28,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:28,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:28,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:28,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:28,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:28,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:28,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:28,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:28,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:28,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:28,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270580967] [2021-04-15 04:04:28,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:28,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:28,575 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:31,070 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-04-15 04:04:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-04-15 04:04:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:31,072 INFO L225 Difference]: With dead ends: 939 [2021-04-15 04:04:31,072 INFO L226 Difference]: Without dead ends: 863 [2021-04-15 04:04:31,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1966.1ms TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 04:04:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-04-15 04:04:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-04-15 04:04:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-04-15 04:04:31,079 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-04-15 04:04:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:31,079 INFO L480 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-04-15 04:04:31,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-04-15 04:04:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:31,080 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:31,080 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:31,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:31,297 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1319188321, now seen corresponding path program 70 times [2021-04-15 04:04:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:31,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601653076] [2021-04-15 04:04:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:31,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601653076] [2021-04-15 04:04:31,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113889495] [2021-04-15 04:04:31,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:31,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:04:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:31,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:31,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:31,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:31,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:31,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:31,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:31,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:04:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:32,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:32,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574767694] [2021-04-15 04:04:32,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:32,069 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:33,655 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-04-15 04:04:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-04-15 04:04:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:33,656 INFO L225 Difference]: With dead ends: 762 [2021-04-15 04:04:33,656 INFO L226 Difference]: Without dead ends: 706 [2021-04-15 04:04:33,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 04:04:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-04-15 04:04:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-04-15 04:04:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:33,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-04-15 04:04:33,663 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-04-15 04:04:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:33,663 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-04-15 04:04:33,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-04-15 04:04:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:33,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:33,664 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:33,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-15 04:04:33,865 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash -264248193, now seen corresponding path program 71 times [2021-04-15 04:04:33,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:33,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268290778] [2021-04-15 04:04:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:34,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268290778] [2021-04-15 04:04:34,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714911854] [2021-04-15 04:04:34,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:34,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:04:34,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:34,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:34,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:34,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:34,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:34,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:34,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:34,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:34,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:34,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:34,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:34,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105974312] [2021-04-15 04:04:34,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:34,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:34,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:34,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:34,695 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:36,251 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-04-15 04:04:36,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:04:36,252 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:36,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:36,253 INFO L225 Difference]: With dead ends: 781 [2021-04-15 04:04:36,253 INFO L226 Difference]: Without dead ends: 685 [2021-04-15 04:04:36,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1419.6ms TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:04:36,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-04-15 04:04:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-04-15 04:04:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-04-15 04:04:36,261 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-04-15 04:04:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:36,261 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-04-15 04:04:36,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-04-15 04:04:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:36,262 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:36,262 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:36,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:36,479 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:36,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1121374397, now seen corresponding path program 72 times [2021-04-15 04:04:36,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:36,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215740599] [2021-04-15 04:04:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:36,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215740599] [2021-04-15 04:04:36,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774729373] [2021-04-15 04:04:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:36,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:04:36,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:04:36,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:37,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:37,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:37,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:37,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:37,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:37,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:37,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:37,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:37,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:37,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308760393] [2021-04-15 04:04:37,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:37,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:37,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:37,332 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:39,601 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-04-15 04:04:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 04:04:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:39,603 INFO L225 Difference]: With dead ends: 862 [2021-04-15 04:04:39,603 INFO L226 Difference]: Without dead ends: 760 [2021-04-15 04:04:39,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1936.5ms TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:04:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-04-15 04:04:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-04-15 04:04:39,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-04-15 04:04:39,610 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-04-15 04:04:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:39,610 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-04-15 04:04:39,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-04-15 04:04:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:39,611 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:39,611 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:39,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 04:04:39,811 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:39,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash 480263807, now seen corresponding path program 73 times [2021-04-15 04:04:39,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:39,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299538714] [2021-04-15 04:04:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:40,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299538714] [2021-04-15 04:04:40,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129184831] [2021-04-15 04:04:40,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:40,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:40,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:40,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:40,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:40,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:40,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:40,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:40,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:40,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:40,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:40,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370365992] [2021-04-15 04:04:40,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:40,595 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:43,639 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-04-15 04:04:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-04-15 04:04:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:43,646 INFO L225 Difference]: With dead ends: 971 [2021-04-15 04:04:43,646 INFO L226 Difference]: Without dead ends: 884 [2021-04-15 04:04:43,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2349.5ms TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-04-15 04:04:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-04-15 04:04:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-04-15 04:04:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-04-15 04:04:43,654 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-04-15 04:04:43,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:43,654 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-04-15 04:04:43,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-04-15 04:04:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:43,655 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:43,655 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:43,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:43,856 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1906506173, now seen corresponding path program 74 times [2021-04-15 04:04:43,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:43,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42412919] [2021-04-15 04:04:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:44,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42412919] [2021-04-15 04:04:44,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102928189] [2021-04-15 04:04:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:44,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:04:44,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:44,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:44,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:44,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:44,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:44,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:44,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:44,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:44,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:44,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362918801] [2021-04-15 04:04:44,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:44,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:44,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:44,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:44,692 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:48,478 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-04-15 04:04:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-04-15 04:04:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:48,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:48,480 INFO L225 Difference]: With dead ends: 1084 [2021-04-15 04:04:48,480 INFO L226 Difference]: Without dead ends: 1005 [2021-04-15 04:04:48,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2910.4ms TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-04-15 04:04:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-04-15 04:04:48,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-04-15 04:04:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-04-15 04:04:48,487 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-04-15 04:04:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:48,487 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-04-15 04:04:48,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-04-15 04:04:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:48,488 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:48,488 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:48,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:48,689 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:48,689 INFO L82 PathProgramCache]: Analyzing trace with hash 991873427, now seen corresponding path program 75 times [2021-04-15 04:04:48,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:48,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924474924] [2021-04-15 04:04:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924474924] [2021-04-15 04:04:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540031946] [2021-04-15 04:04:48,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:49,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:04:49,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:49,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:49,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:49,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:49,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:49,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:49,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:49,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:04:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:49,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:49,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:49,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292025754] [2021-04-15 04:04:49,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:49,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:49,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:49,576 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:51,648 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-04-15 04:04:51,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:04:51,649 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:51,650 INFO L225 Difference]: With dead ends: 858 [2021-04-15 04:04:51,650 INFO L226 Difference]: Without dead ends: 799 [2021-04-15 04:04:51,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1862.0ms TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:04:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-04-15 04:04:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-04-15 04:04:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-04-15 04:04:51,658 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-04-15 04:04:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:51,658 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-04-15 04:04:51,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-04-15 04:04:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:51,659 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:51,659 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:51,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:51,868 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash 995289705, now seen corresponding path program 76 times [2021-04-15 04:04:51,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:51,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024449759] [2021-04-15 04:04:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:52,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024449759] [2021-04-15 04:04:52,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748917050] [2021-04-15 04:04:52,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:52,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:04:52,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:52,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:52,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:52,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:52,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:52,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:52,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:52,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:52,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:52,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57349412] [2021-04-15 04:04:52,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:52,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:52,801 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:55,863 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-04-15 04:04:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 04:04:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:04:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:55,864 INFO L225 Difference]: With dead ends: 923 [2021-04-15 04:04:55,864 INFO L226 Difference]: Without dead ends: 835 [2021-04-15 04:04:55,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2597.9ms TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-04-15 04:04:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-04-15 04:04:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-04-15 04:04:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-04-15 04:04:55,879 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-04-15 04:04:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:55,879 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-04-15 04:04:55,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-04-15 04:04:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:04:55,884 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:55,884 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:56,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:56,092 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:56,092 INFO L82 PathProgramCache]: Analyzing trace with hash 354179115, now seen corresponding path program 77 times [2021-04-15 04:04:56,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:56,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892016429] [2021-04-15 04:04:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:56,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892016429] [2021-04-15 04:04:56,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66294755] [2021-04-15 04:04:56,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:56,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:04:56,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:04:56,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:56,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:56,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:04:56,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:04:56,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:04:56,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:04:56,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:04:56,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:04:56,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:04:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:56,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:56,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:04:56,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282211952] [2021-04-15 04:04:56,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:04:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:56,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:04:56,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:04:56,998 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:00,180 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-04-15 04:05:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-04-15 04:05:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:00,182 INFO L225 Difference]: With dead ends: 1025 [2021-04-15 04:05:00,182 INFO L226 Difference]: Without dead ends: 945 [2021-04-15 04:05:00,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2775.0ms TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 04:05:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-04-15 04:05:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-04-15 04:05:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-04-15 04:05:00,190 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-04-15 04:05:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:00,190 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-04-15 04:05:00,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-04-15 04:05:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:00,191 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:00,191 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:00,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:00,392 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:00,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1780421481, now seen corresponding path program 78 times [2021-04-15 04:05:00,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:00,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890413465] [2021-04-15 04:05:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:00,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890413465] [2021-04-15 04:05:00,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579206823] [2021-04-15 04:05:00,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:00,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:05:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:00,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:01,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:01,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:01,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:01,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:01,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:01,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:01,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:01,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779439663] [2021-04-15 04:05:01,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:01,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:01,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:01,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:01,242 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:05,143 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-04-15 04:05:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 04:05:05,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:05,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:05,146 INFO L225 Difference]: With dead ends: 999 [2021-04-15 04:05:05,146 INFO L226 Difference]: Without dead ends: 943 [2021-04-15 04:05:05,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 3018.6ms TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 04:05:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-04-15 04:05:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-04-15 04:05:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-04-15 04:05:05,156 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-04-15 04:05:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:05,156 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-04-15 04:05:05,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-04-15 04:05:05,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:05,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:05,157 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:05,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:05,358 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:05,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:05,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1675574863, now seen corresponding path program 79 times [2021-04-15 04:05:05,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:05,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884326331] [2021-04-15 04:05:05,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:05,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884326331] [2021-04-15 04:05:05,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685826292] [2021-04-15 04:05:05,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:05,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:06,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:06,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:06,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:06,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:05:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:06,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:06,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99973536] [2021-04-15 04:05:06,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:06,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:06,432 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:09,043 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-04-15 04:05:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 04:05:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:09,045 INFO L225 Difference]: With dead ends: 987 [2021-04-15 04:05:09,045 INFO L226 Difference]: Without dead ends: 931 [2021-04-15 04:05:09,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2329.2ms TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:05:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-04-15 04:05:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-04-15 04:05:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-04-15 04:05:09,054 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-04-15 04:05:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:09,054 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-04-15 04:05:09,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-04-15 04:05:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:09,055 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:09,055 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:09,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:09,269 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1261063915, now seen corresponding path program 80 times [2021-04-15 04:05:09,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:09,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339941464] [2021-04-15 04:05:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339941464] [2021-04-15 04:05:09,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613000155] [2021-04-15 04:05:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:09,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:05:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:10,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:10,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:10,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:10,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:10,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:10,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:10,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:10,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:10,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:10,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:10,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261290350] [2021-04-15 04:05:10,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:10,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:10,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:10,205 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:11,810 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-04-15 04:05:11,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:05:11,811 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:11,813 INFO L225 Difference]: With dead ends: 1026 [2021-04-15 04:05:11,813 INFO L226 Difference]: Without dead ends: 930 [2021-04-15 04:05:11,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1552.2ms TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:05:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-04-15 04:05:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-04-15 04:05:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-04-15 04:05:11,823 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-04-15 04:05:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:11,823 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-04-15 04:05:11,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-04-15 04:05:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:11,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:11,824 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:12,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-15 04:05:12,025 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash 124558675, now seen corresponding path program 81 times [2021-04-15 04:05:12,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:12,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131826337] [2021-04-15 04:05:12,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:12,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131826337] [2021-04-15 04:05:12,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115870961] [2021-04-15 04:05:12,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:12,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:05:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:12,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:12,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:12,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:12,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:12,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:12,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:12,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:12,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:12,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986058334] [2021-04-15 04:05:12,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:12,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:12,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:12,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:12,973 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:14,586 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-04-15 04:05:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:05:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:14,588 INFO L225 Difference]: With dead ends: 1041 [2021-04-15 04:05:14,588 INFO L226 Difference]: Without dead ends: 953 [2021-04-15 04:05:14,589 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1602.7ms TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:05:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-04-15 04:05:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-04-15 04:05:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-04-15 04:05:14,598 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-04-15 04:05:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:14,598 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-04-15 04:05:14,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-04-15 04:05:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:14,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:14,599 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:14,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:14,810 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash -516551915, now seen corresponding path program 82 times [2021-04-15 04:05:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:14,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047217019] [2021-04-15 04:05:14,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047217019] [2021-04-15 04:05:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304435431] [2021-04-15 04:05:15,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:15,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:05:15,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:15,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:15,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:15,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:15,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:15,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:15,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:15,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:15,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853630785] [2021-04-15 04:05:15,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:15,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:15,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:15,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:15,765 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:18,358 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-04-15 04:05:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 04:05:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:18,360 INFO L225 Difference]: With dead ends: 1128 [2021-04-15 04:05:18,360 INFO L226 Difference]: Without dead ends: 1032 [2021-04-15 04:05:18,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2241.4ms TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:05:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-04-15 04:05:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-04-15 04:05:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-04-15 04:05:18,370 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-04-15 04:05:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:18,370 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-04-15 04:05:18,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-04-15 04:05:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:18,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:18,372 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:18,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-04-15 04:05:18,573 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:18,573 INFO L82 PathProgramCache]: Analyzing trace with hash 909690451, now seen corresponding path program 83 times [2021-04-15 04:05:18,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:18,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016424607] [2021-04-15 04:05:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:18,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016424607] [2021-04-15 04:05:18,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917267325] [2021-04-15 04:05:18,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:18,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:05:18,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:19,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:19,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:19,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:19,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:19,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:19,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:19,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:19,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835159186] [2021-04-15 04:05:19,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:19,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:19,544 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:22,914 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-04-15 04:05:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 04:05:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:22,916 INFO L225 Difference]: With dead ends: 1294 [2021-04-15 04:05:22,916 INFO L226 Difference]: Without dead ends: 1216 [2021-04-15 04:05:22,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2882.2ms TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-04-15 04:05:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-04-15 04:05:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-04-15 04:05:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-04-15 04:05:22,928 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-04-15 04:05:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:22,929 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-04-15 04:05:22,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-04-15 04:05:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:22,930 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:22,930 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:23,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:23,147 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -4942295, now seen corresponding path program 84 times [2021-04-15 04:05:23,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:23,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073624149] [2021-04-15 04:05:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073624149] [2021-04-15 04:05:23,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195492918] [2021-04-15 04:05:23,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:23,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:05:23,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:05:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:23,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:23,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:23,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:23,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:23,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:16 [2021-04-15 04:05:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:24,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:24,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-04-15 04:05:24,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371913066] [2021-04-15 04:05:24,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:05:24,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:24,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:05:24,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:05:24,083 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:26,656 INFO L93 Difference]: Finished difference Result 1058 states and 2111 transitions. [2021-04-15 04:05:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:05:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:26,664 INFO L225 Difference]: With dead ends: 1058 [2021-04-15 04:05:26,664 INFO L226 Difference]: Without dead ends: 996 [2021-04-15 04:05:26,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2365.5ms TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:05:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-04-15 04:05:26,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 862. [2021-04-15 04:05:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-04-15 04:05:26,673 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-04-15 04:05:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:26,673 INFO L480 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-04-15 04:05:26,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-04-15 04:05:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:26,674 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:26,674 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:26,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:26,877 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash 491236367, now seen corresponding path program 85 times [2021-04-15 04:05:26,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:26,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309350973] [2021-04-15 04:05:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:27,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309350973] [2021-04-15 04:05:27,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621335356] [2021-04-15 04:05:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:27,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:27,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:27,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:27,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:27,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:27,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:27,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:27,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:27,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:27,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:27,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-04-15 04:05:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992292908] [2021-04-15 04:05:27,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:05:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:05:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:05:27,840 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:30,134 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-04-15 04:05:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:05:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:30,137 INFO L225 Difference]: With dead ends: 1056 [2021-04-15 04:05:30,137 INFO L226 Difference]: Without dead ends: 968 [2021-04-15 04:05:30,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2002.6ms TimeCoverageRelationStatistics Valid=314, Invalid=3108, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:05:30,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-04-15 04:05:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-04-15 04:05:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-04-15 04:05:30,146 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-04-15 04:05:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:30,146 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-04-15 04:05:30,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-04-15 04:05:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:30,147 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:30,147 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:30,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:30,348 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash -149874223, now seen corresponding path program 86 times [2021-04-15 04:05:30,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:30,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470259226] [2021-04-15 04:05:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:30,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470259226] [2021-04-15 04:05:30,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226058045] [2021-04-15 04:05:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:30,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:05:30,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:30,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:31,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:31,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:31,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:31,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:31,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:31,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:31,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:31,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-04-15 04:05:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628314744] [2021-04-15 04:05:31,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:05:31,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:31,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:05:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:05:31,332 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:33,717 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-04-15 04:05:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:05:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:33,720 INFO L225 Difference]: With dead ends: 1078 [2021-04-15 04:05:33,720 INFO L226 Difference]: Without dead ends: 1006 [2021-04-15 04:05:33,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 2180.9ms TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 04:05:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-04-15 04:05:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-04-15 04:05:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-04-15 04:05:33,730 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-04-15 04:05:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:33,730 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-04-15 04:05:33,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-04-15 04:05:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:33,731 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:33,731 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:33,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:33,945 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1276368143, now seen corresponding path program 87 times [2021-04-15 04:05:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:33,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368914673] [2021-04-15 04:05:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:34,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368914673] [2021-04-15 04:05:34,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585911425] [2021-04-15 04:05:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:34,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:05:34,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:34,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:05:34,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:05:34,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:05:34,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:34,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:34,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:34,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:05:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:34,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:34,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-04-15 04:05:34,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748102335] [2021-04-15 04:05:34,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 04:05:34,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 04:05:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:05:35,000 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:38,205 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-04-15 04:05:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:05:38,206 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:38,207 INFO L225 Difference]: With dead ends: 1116 [2021-04-15 04:05:38,207 INFO L226 Difference]: Without dead ends: 1054 [2021-04-15 04:05:38,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2730.9ms TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:05:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-04-15 04:05:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-04-15 04:05:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-04-15 04:05:38,216 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-04-15 04:05:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:38,217 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-04-15 04:05:38,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-04-15 04:05:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:38,218 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:38,218 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:38,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:38,418 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:38,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1501435129, now seen corresponding path program 88 times [2021-04-15 04:05:38,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:38,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764529502] [2021-04-15 04:05:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:38,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764529502] [2021-04-15 04:05:38,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925750944] [2021-04-15 04:05:38,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:38,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:05:38,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:39,186 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:05:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:05:39,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:39,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:39,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:39,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:05:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:39,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:39,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:39,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121250127] [2021-04-15 04:05:39,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:39,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:39,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:39,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:39,353 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:40,793 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-04-15 04:05:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:05:40,794 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:40,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:40,795 INFO L225 Difference]: With dead ends: 1029 [2021-04-15 04:05:40,795 INFO L226 Difference]: Without dead ends: 981 [2021-04-15 04:05:40,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1311.5ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:05:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-04-15 04:05:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-04-15 04:05:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-04-15 04:05:40,805 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-04-15 04:05:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:40,805 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-04-15 04:05:40,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-04-15 04:05:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:40,806 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:40,806 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:41,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:41,021 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash -222063415, now seen corresponding path program 89 times [2021-04-15 04:05:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:41,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817230168] [2021-04-15 04:05:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:41,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817230168] [2021-04-15 04:05:41,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115060692] [2021-04-15 04:05:41,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:41,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:05:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:05:41,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:41,772 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:05:41,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:05:41,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:41,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:41,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:41,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:05:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:41,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:41,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:41,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536384186] [2021-04-15 04:05:41,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:41,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:41,941 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:43,225 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-04-15 04:05:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:05:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:43,228 INFO L225 Difference]: With dead ends: 1066 [2021-04-15 04:05:43,228 INFO L226 Difference]: Without dead ends: 1018 [2021-04-15 04:05:43,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1301.6ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:05:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-04-15 04:05:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-04-15 04:05:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-04-15 04:05:43,236 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-04-15 04:05:43,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:43,236 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-04-15 04:05:43,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-04-15 04:05:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:43,238 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:43,238 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:43,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-04-15 04:05:43,438 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1163559175, now seen corresponding path program 90 times [2021-04-15 04:05:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:43,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396206685] [2021-04-15 04:05:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:43,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396206685] [2021-04-15 04:05:43,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263101346] [2021-04-15 04:05:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:43,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:05:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:05:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:44,234 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:05:44,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:05:44,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:44,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:44,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:44,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:05:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:44,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:44,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:44,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038217792] [2021-04-15 04:05:44,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:44,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:44,460 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:46,012 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-04-15 04:05:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:05:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:46,015 INFO L225 Difference]: With dead ends: 1104 [2021-04-15 04:05:46,015 INFO L226 Difference]: Without dead ends: 1056 [2021-04-15 04:05:46,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1537.8ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:05:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-04-15 04:05:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-04-15 04:05:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-04-15 04:05:46,024 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-04-15 04:05:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:46,024 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-04-15 04:05:46,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-04-15 04:05:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:46,025 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:46,025 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:46,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:46,226 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash 522448585, now seen corresponding path program 91 times [2021-04-15 04:05:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:46,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594370193] [2021-04-15 04:05:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:46,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594370193] [2021-04-15 04:05:46,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929572486] [2021-04-15 04:05:46,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:46,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:05:46,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:05:46,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:46,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:46,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:46,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:05:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:47,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:47,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:47,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404330829] [2021-04-15 04:05:47,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:47,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:47,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:47,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:47,176 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:49,110 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-04-15 04:05:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:05:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:49,112 INFO L225 Difference]: With dead ends: 1137 [2021-04-15 04:05:49,112 INFO L226 Difference]: Without dead ends: 1105 [2021-04-15 04:05:49,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1526.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 04:05:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-04-15 04:05:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-04-15 04:05:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-04-15 04:05:49,121 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-04-15 04:05:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:49,121 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-04-15 04:05:49,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-04-15 04:05:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:49,122 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:49,122 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:49,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 04:05:49,323 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:49,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1948690951, now seen corresponding path program 92 times [2021-04-15 04:05:49,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:49,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336232095] [2021-04-15 04:05:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:49,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336232095] [2021-04-15 04:05:49,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984849886] [2021-04-15 04:05:49,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:49,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:05:49,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:49,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:50,139 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:05:50,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:05:50,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:50,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:50,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:50,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:05:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:50,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:50,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:50,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079764945] [2021-04-15 04:05:50,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:50,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:50,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:50,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:50,376 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:53,019 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-04-15 04:05:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:05:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:53,022 INFO L225 Difference]: With dead ends: 1204 [2021-04-15 04:05:53,022 INFO L226 Difference]: Without dead ends: 1160 [2021-04-15 04:05:53,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1979.7ms TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:05:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-04-15 04:05:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-04-15 04:05:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-04-15 04:05:53,032 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-04-15 04:05:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:53,032 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-04-15 04:05:53,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-04-15 04:05:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:53,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:53,033 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:53,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:53,234 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:53,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:53,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1310975239, now seen corresponding path program 93 times [2021-04-15 04:05:53,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:53,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039354686] [2021-04-15 04:05:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:53,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039354686] [2021-04-15 04:05:53,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271713011] [2021-04-15 04:05:53,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:53,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:05:53,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:53,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:53,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:53,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:05:53,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:05:53,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:53,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:53,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:53,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-04-15 04:05:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:54,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:54,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:54,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696220411] [2021-04-15 04:05:54,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:54,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:54,293 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:55,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:55,925 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-04-15 04:05:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:05:55,926 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:55,928 INFO L225 Difference]: With dead ends: 1027 [2021-04-15 04:05:55,928 INFO L226 Difference]: Without dead ends: 999 [2021-04-15 04:05:55,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1488.5ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:05:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-04-15 04:05:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-04-15 04:05:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-04-15 04:05:55,937 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-04-15 04:05:55,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:55,937 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-04-15 04:05:55,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:55,937 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-04-15 04:05:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:55,938 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:55,938 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:56,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 04:05:56,139 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash -507368251, now seen corresponding path program 94 times [2021-04-15 04:05:56,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:56,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029196868] [2021-04-15 04:05:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:56,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029196868] [2021-04-15 04:05:56,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654298389] [2021-04-15 04:05:56,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:56,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:05:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:05:56,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:05:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:56,961 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:05:56,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:05:56,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:05:56,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:05:56,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:05:56,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:05:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:57,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:57,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:05:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496976919] [2021-04-15 04:05:57,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:05:57,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:57,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:05:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:05:57,163 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:59,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:59,398 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-04-15 04:05:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 04:05:59,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:05:59,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:59,401 INFO L225 Difference]: With dead ends: 1070 [2021-04-15 04:05:59,401 INFO L226 Difference]: Without dead ends: 974 [2021-04-15 04:05:59,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1937.0ms TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:05:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-04-15 04:05:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-04-15 04:05:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-04-15 04:05:59,410 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-04-15 04:05:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:59,410 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-04-15 04:05:59,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-04-15 04:05:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:05:59,411 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:59,411 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:59,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 04:05:59,612 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:59,612 INFO L82 PathProgramCache]: Analyzing trace with hash 878254339, now seen corresponding path program 95 times [2021-04-15 04:05:59,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:59,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229490518] [2021-04-15 04:05:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:00,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229490518] [2021-04-15 04:06:00,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104206206] [2021-04-15 04:06:00,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:00,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:06:00,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:00,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 04:06:00,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:00,516 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:06:00,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:06:00,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:00,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:00,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:00,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:06:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:00,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:00,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-04-15 04:06:00,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694828063] [2021-04-15 04:06:00,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:06:00,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:06:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:06:00,821 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:03,603 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-04-15 04:06:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:06:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:03,605 INFO L225 Difference]: With dead ends: 1128 [2021-04-15 04:06:03,605 INFO L226 Difference]: Without dead ends: 1033 [2021-04-15 04:06:03,606 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2491.9ms TimeCoverageRelationStatistics Valid=410, Invalid=4282, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 04:06:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-04-15 04:06:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-04-15 04:06:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-04-15 04:06:03,615 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-04-15 04:06:03,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:03,615 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-04-15 04:06:03,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:03,615 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-04-15 04:06:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:03,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:03,616 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:03,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 04:06:03,820 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:03,820 INFO L82 PathProgramCache]: Analyzing trace with hash 237143749, now seen corresponding path program 96 times [2021-04-15 04:06:03,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:03,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520125099] [2021-04-15 04:06:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520125099] [2021-04-15 04:06:04,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109843183] [2021-04-15 04:06:04,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:04,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:06:04,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:04,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:04,626 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:04,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:04,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:04,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:04,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:06:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:04,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:04,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:04,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582708623] [2021-04-15 04:06:04,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:04,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:04,863 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:07,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:07,964 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-04-15 04:06:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 04:06:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:07,966 INFO L225 Difference]: With dead ends: 1153 [2021-04-15 04:06:07,966 INFO L226 Difference]: Without dead ends: 1073 [2021-04-15 04:06:07,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2623.8ms TimeCoverageRelationStatistics Valid=537, Invalid=4433, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:06:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-04-15 04:06:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-04-15 04:06:07,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-04-15 04:06:07,976 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-04-15 04:06:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:07,976 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-04-15 04:06:07,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-04-15 04:06:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:07,977 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:07,977 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:08,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:08,181 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:08,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386115, now seen corresponding path program 97 times [2021-04-15 04:06:08,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:08,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668071325] [2021-04-15 04:06:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:08,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668071325] [2021-04-15 04:06:08,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845492294] [2021-04-15 04:06:08,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:08,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:08,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:08,968 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:08,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:08,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:08,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:08,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:08,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:06:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:09,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:09,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:09,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010846509] [2021-04-15 04:06:09,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:09,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:09,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:09,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:09,224 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:12,673 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-04-15 04:06:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 04:06:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:12,676 INFO L225 Difference]: With dead ends: 1223 [2021-04-15 04:06:12,676 INFO L226 Difference]: Without dead ends: 1164 [2021-04-15 04:06:12,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 2817.4ms TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 04:06:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-04-15 04:06:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-04-15 04:06:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-04-15 04:06:12,685 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-04-15 04:06:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:12,685 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-04-15 04:06:12,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-04-15 04:06:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:12,686 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:12,686 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:12,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-04-15 04:06:12,887 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash 748753369, now seen corresponding path program 98 times [2021-04-15 04:06:12,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:12,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110864081] [2021-04-15 04:06:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:13,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110864081] [2021-04-15 04:06:13,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300108931] [2021-04-15 04:06:13,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:13,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:06:13,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:13,672 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:13,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:13,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:13,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:13,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:13,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:06:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:13,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:13,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533363597] [2021-04-15 04:06:13,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:13,959 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:16,887 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-04-15 04:06:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:06:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:16,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:16,889 INFO L225 Difference]: With dead ends: 1093 [2021-04-15 04:06:16,889 INFO L226 Difference]: Without dead ends: 1034 [2021-04-15 04:06:16,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2433.5ms TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:06:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-04-15 04:06:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-04-15 04:06:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-04-15 04:06:16,898 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-04-15 04:06:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:16,898 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-04-15 04:06:16,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-04-15 04:06:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:16,899 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:16,899 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:17,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:17,100 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash -834683145, now seen corresponding path program 99 times [2021-04-15 04:06:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:17,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559310411] [2021-04-15 04:06:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:17,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559310411] [2021-04-15 04:06:17,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177486829] [2021-04-15 04:06:17,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:17,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:06:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:17,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:17,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:18,082 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:06:18,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:06:18,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:18,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:18,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:18,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:06:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:18,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:18,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:18,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259381093] [2021-04-15 04:06:18,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:18,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:18,297 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:20,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:20,649 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-04-15 04:06:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:06:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:20,654 INFO L225 Difference]: With dead ends: 1156 [2021-04-15 04:06:20,654 INFO L226 Difference]: Without dead ends: 1060 [2021-04-15 04:06:20,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2025.9ms TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:06:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-04-15 04:06:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-04-15 04:06:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-04-15 04:06:20,663 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-04-15 04:06:20,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:20,663 INFO L480 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-04-15 04:06:20,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-04-15 04:06:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:20,665 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:20,665 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:20,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-04-15 04:06:20,866 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash 550939445, now seen corresponding path program 100 times [2021-04-15 04:06:20,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:20,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099844026] [2021-04-15 04:06:20,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:21,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099844026] [2021-04-15 04:06:21,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296540318] [2021-04-15 04:06:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:21,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:06:21,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:21,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:21,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:21,783 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:21,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:21,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:21,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:21,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:21,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:06:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:22,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:22,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:22,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659662012] [2021-04-15 04:06:22,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:22,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:22,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:22,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:22,040 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:25,644 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-04-15 04:06:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 04:06:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:25,647 INFO L225 Difference]: With dead ends: 1272 [2021-04-15 04:06:25,648 INFO L226 Difference]: Without dead ends: 1170 [2021-04-15 04:06:25,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2798.8ms TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:06:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-04-15 04:06:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-04-15 04:06:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-04-15 04:06:25,657 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-04-15 04:06:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:25,657 INFO L480 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-04-15 04:06:25,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-04-15 04:06:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:25,659 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:25,659 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:25,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:25,859 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:25,860 INFO L82 PathProgramCache]: Analyzing trace with hash -90171145, now seen corresponding path program 101 times [2021-04-15 04:06:25,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:25,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552987074] [2021-04-15 04:06:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:26,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552987074] [2021-04-15 04:06:26,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232319573] [2021-04-15 04:06:26,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:26,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:06:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:26,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:06:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:06:26,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:06:26,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:06:26,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:06:26,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:26,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:26,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:26,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-04-15 04:06:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:27,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:27,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-04-15 04:06:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096727617] [2021-04-15 04:06:27,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:06:27,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:06:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:06:27,150 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:32,528 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-04-15 04:06:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 04:06:32,530 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:32,531 INFO L225 Difference]: With dead ends: 1420 [2021-04-15 04:06:32,531 INFO L226 Difference]: Without dead ends: 1321 [2021-04-15 04:06:32,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 4306.3ms TimeCoverageRelationStatistics Valid=797, Invalid=7945, Unknown=0, NotChecked=0, Total=8742 [2021-04-15 04:06:32,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-04-15 04:06:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-04-15 04:06:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-04-15 04:06:32,542 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-04-15 04:06:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:32,542 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-04-15 04:06:32,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-04-15 04:06:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:32,543 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:32,544 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:32,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:32,749 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:32,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1336071221, now seen corresponding path program 102 times [2021-04-15 04:06:32,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:32,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855245999] [2021-04-15 04:06:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:33,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855245999] [2021-04-15 04:06:33,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699156062] [2021-04-15 04:06:33,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:33,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:06:33,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:06:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:33,663 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:33,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:33,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:33,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:33,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:33,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-04-15 04:06:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:33,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:33,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647999995] [2021-04-15 04:06:33,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:33,927 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:40,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:40,092 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-04-15 04:06:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-04-15 04:06:40,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:40,095 INFO L225 Difference]: With dead ends: 1535 [2021-04-15 04:06:40,095 INFO L226 Difference]: Without dead ends: 1473 [2021-04-15 04:06:40,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 4229.8ms TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-04-15 04:06:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-04-15 04:06:40,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-04-15 04:06:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-04-15 04:06:40,107 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-04-15 04:06:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:40,107 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-04-15 04:06:40,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-04-15 04:06:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:40,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:40,108 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:40,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 04:06:40,309 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash 421438475, now seen corresponding path program 103 times [2021-04-15 04:06:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290743513] [2021-04-15 04:06:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:40,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290743513] [2021-04-15 04:06:40,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425332967] [2021-04-15 04:06:40,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:41,177 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:41,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:41,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:41,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:41,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:41,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:06:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:41,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:41,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:41,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201643305] [2021-04-15 04:06:41,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:41,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:41,578 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:45,248 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-04-15 04:06:45,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:06:45,250 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:45,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:45,252 INFO L225 Difference]: With dead ends: 1427 [2021-04-15 04:06:45,252 INFO L226 Difference]: Without dead ends: 1371 [2021-04-15 04:06:45,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2935.7ms TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:06:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-04-15 04:06:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-04-15 04:06:45,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-04-15 04:06:45,264 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-04-15 04:06:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:45,264 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-04-15 04:06:45,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-04-15 04:06:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:45,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:45,266 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:45,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:45,467 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 424854753, now seen corresponding path program 104 times [2021-04-15 04:06:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:45,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399335936] [2021-04-15 04:06:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:46,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399335936] [2021-04-15 04:06:46,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655817132] [2021-04-15 04:06:46,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:46,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:06:46,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:46,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:46,542 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:06:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:06:46,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:46,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:46,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:46,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:06:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:46,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:46,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:46,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467273555] [2021-04-15 04:06:46,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:46,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:46,807 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:50,577 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-04-15 04:06:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-04-15 04:06:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:50,580 INFO L225 Difference]: With dead ends: 1723 [2021-04-15 04:06:50,580 INFO L226 Difference]: Without dead ends: 1635 [2021-04-15 04:06:50,581 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 3608.5ms TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 04:06:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-04-15 04:06:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-04-15 04:06:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:50,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-04-15 04:06:50,595 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-04-15 04:06:50,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:50,595 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-04-15 04:06:50,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:50,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-04-15 04:06:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:50,596 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:50,596 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:50,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:50,804 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash -216255837, now seen corresponding path program 105 times [2021-04-15 04:06:50,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:50,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593735042] [2021-04-15 04:06:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:50,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593735042] [2021-04-15 04:06:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898666823] [2021-04-15 04:06:51,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:51,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:06:51,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:51,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:51,767 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:06:51,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:06:51,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:51,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:51,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:51,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:06:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:52,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:52,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:52,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141644207] [2021-04-15 04:06:52,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:52,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:52,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:52,131 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:06:57,415 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-04-15 04:06:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-04-15 04:06:57,417 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:06:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:06:57,419 INFO L225 Difference]: With dead ends: 1938 [2021-04-15 04:06:57,419 INFO L226 Difference]: Without dead ends: 1858 [2021-04-15 04:06:57,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 4157.0ms TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 04:06:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-04-15 04:06:57,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-04-15 04:06:57,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:57,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-04-15 04:06:57,434 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-04-15 04:06:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:06:57,434 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-04-15 04:06:57,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:06:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-04-15 04:06:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:06:57,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:06:57,436 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:06:57,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 04:06:57,637 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:06:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:06:57,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1209986529, now seen corresponding path program 106 times [2021-04-15 04:06:57,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:06:57,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637436010] [2021-04-15 04:06:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:06:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:06:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637436010] [2021-04-15 04:06:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707915905] [2021-04-15 04:06:58,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:06:58,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:06:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:06:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:06:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:06:58,883 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:06:58,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:06:58,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:06:58,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:06:58,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:06:58,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:06:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:06:59,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:06:59,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:06:59,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17292686] [2021-04-15 04:06:59,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:06:59,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:06:59,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:06:59,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:06:59,237 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:05,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:05,191 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-04-15 04:07:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 04:07:05,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:05,195 INFO L225 Difference]: With dead ends: 1677 [2021-04-15 04:07:05,195 INFO L226 Difference]: Without dead ends: 1621 [2021-04-15 04:07:05,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 4979.8ms TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-04-15 04:07:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-04-15 04:07:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-04-15 04:07:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-04-15 04:07:05,209 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-04-15 04:07:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:05,209 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-04-15 04:07:05,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:05,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-04-15 04:07:05,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:05,210 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:05,210 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:05,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-04-15 04:07:05,411 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:05,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:05,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1105139911, now seen corresponding path program 107 times [2021-04-15 04:07:05,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:05,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814138528] [2021-04-15 04:07:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:06,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814138528] [2021-04-15 04:07:06,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235888711] [2021-04-15 04:07:06,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:06,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:07:06,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:06,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:07:06,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:06,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:07:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:07:06,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:07:06,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-04-15 04:07:06,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:06,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:06,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:06,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-04-15 04:07:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:07,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:07,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-04-15 04:07:07,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085303830] [2021-04-15 04:07:07,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:07:07,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:07,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:07:07,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:07:07,134 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:11,686 INFO L93 Difference]: Finished difference Result 1775 states and 3563 transitions. [2021-04-15 04:07:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 04:07:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:11,691 INFO L225 Difference]: With dead ends: 1775 [2021-04-15 04:07:11,691 INFO L226 Difference]: Without dead ends: 1705 [2021-04-15 04:07:11,691 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 3890.2ms TimeCoverageRelationStatistics Valid=519, Invalid=4883, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 04:07:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-04-15 04:07:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-04-15 04:07:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-04-15 04:07:11,705 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-04-15 04:07:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:11,705 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-04-15 04:07:11,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-04-15 04:07:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:11,707 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:11,707 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:11,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 04:07:11,907 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:11,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1831498867, now seen corresponding path program 108 times [2021-04-15 04:07:11,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:11,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002365599] [2021-04-15 04:07:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002365599] [2021-04-15 04:07:12,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508830193] [2021-04-15 04:07:12,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:12,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:07:12,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:07:12,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:13,159 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:07:13,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:07:13,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:13,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:13,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:13,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-04-15 04:07:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:13,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:13,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:07:13,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794896087] [2021-04-15 04:07:13,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:07:13,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:13,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:07:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:07:13,442 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:16,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:16,411 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-04-15 04:07:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:07:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:16,415 INFO L225 Difference]: With dead ends: 1677 [2021-04-15 04:07:16,415 INFO L226 Difference]: Without dead ends: 1581 [2021-04-15 04:07:16,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2661.7ms TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:07:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-04-15 04:07:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-04-15 04:07:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:16,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-04-15 04:07:16,429 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-04-15 04:07:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:16,429 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-04-15 04:07:16,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-04-15 04:07:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:16,431 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:16,431 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:16,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:16,632 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash -445876277, now seen corresponding path program 109 times [2021-04-15 04:07:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:16,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047661596] [2021-04-15 04:07:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:17,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047661596] [2021-04-15 04:07:17,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766493022] [2021-04-15 04:07:17,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:07:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:17,838 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:07:17,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:07:17,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:17,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:17,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:17,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:07:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:18,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:18,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:07:18,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871697276] [2021-04-15 04:07:18,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:07:18,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:18,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:07:18,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:07:18,138 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:21,319 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-04-15 04:07:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:07:21,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:21,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:21,323 INFO L225 Difference]: With dead ends: 1692 [2021-04-15 04:07:21,323 INFO L226 Difference]: Without dead ends: 1604 [2021-04-15 04:07:21,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 2723.5ms TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:07:21,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-04-15 04:07:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-04-15 04:07:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-04-15 04:07:21,336 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-04-15 04:07:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:21,336 INFO L480 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-04-15 04:07:21,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-04-15 04:07:21,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:21,338 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:21,338 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:21,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 04:07:21,538 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:21,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:21,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1086986867, now seen corresponding path program 110 times [2021-04-15 04:07:21,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:21,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374429586] [2021-04-15 04:07:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:22,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374429586] [2021-04-15 04:07:22,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248708928] [2021-04-15 04:07:22,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:22,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:07:22,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:22,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:07:22,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:22,642 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:07:22,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:07:22,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:22,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:22,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:22,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:07:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:23,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:23,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:07:23,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509893535] [2021-04-15 04:07:23,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:07:23,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:23,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:07:23,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:07:23,008 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:27,288 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-04-15 04:07:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 04:07:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:27,292 INFO L225 Difference]: With dead ends: 1779 [2021-04-15 04:07:27,292 INFO L226 Difference]: Without dead ends: 1683 [2021-04-15 04:07:27,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 3543.8ms TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:07:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-04-15 04:07:27,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-04-15 04:07:27,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-04-15 04:07:27,306 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-04-15 04:07:27,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:27,306 INFO L480 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-04-15 04:07:27,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:27,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-04-15 04:07:27,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:27,308 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:27,308 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:27,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-15 04:07:27,509 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash 339255499, now seen corresponding path program 111 times [2021-04-15 04:07:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:27,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449605174] [2021-04-15 04:07:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:28,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449605174] [2021-04-15 04:07:28,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603979776] [2021-04-15 04:07:28,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:28,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:07:28,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:28,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:07:28,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:28,635 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:07:28,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:07:28,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:28,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:28,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:28,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:07:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:28,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:28,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:07:28,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697101562] [2021-04-15 04:07:28,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:07:28,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:07:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:07:28,964 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:35,090 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-04-15 04:07:35,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 04:07:35,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:35,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:35,096 INFO L225 Difference]: With dead ends: 1945 [2021-04-15 04:07:35,096 INFO L226 Difference]: Without dead ends: 1867 [2021-04-15 04:07:35,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 4846.0ms TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 04:07:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-04-15 04:07:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-04-15 04:07:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-04-15 04:07:35,113 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-04-15 04:07:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:35,113 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-04-15 04:07:35,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-04-15 04:07:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:35,115 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:35,115 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:35,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 04:07:35,316 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash -575377247, now seen corresponding path program 112 times [2021-04-15 04:07:35,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:35,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342780616] [2021-04-15 04:07:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:36,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342780616] [2021-04-15 04:07:36,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131646788] [2021-04-15 04:07:36,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:36,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:07:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:07:36,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:36,791 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:07:36,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:07:36,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:36,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:36,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:36,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:07:37,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:37,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:37,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:07:37,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215756342] [2021-04-15 04:07:37,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:07:37,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:07:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:07:37,388 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:42,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:42,817 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-04-15 04:07:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:07:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:42,822 INFO L225 Difference]: With dead ends: 1709 [2021-04-15 04:07:42,822 INFO L226 Difference]: Without dead ends: 1647 [2021-04-15 04:07:42,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 4693.8ms TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:07:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-04-15 04:07:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-04-15 04:07:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-04-15 04:07:42,836 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-04-15 04:07:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:42,836 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-04-15 04:07:42,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-04-15 04:07:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:42,838 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:42,838 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:43,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:43,039 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash -79198585, now seen corresponding path program 113 times [2021-04-15 04:07:43,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:43,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627674350] [2021-04-15 04:07:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:43,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627674350] [2021-04-15 04:07:43,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641021523] [2021-04-15 04:07:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:43,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:07:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 04:07:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:44,579 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:07:44,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:07:44,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:44,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:44,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:44,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:07:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:44,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:44,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-04-15 04:07:44,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550289763] [2021-04-15 04:07:44,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 04:07:44,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:44,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 04:07:44,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 04:07:44,995 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:49,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:49,303 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-04-15 04:07:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:07:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:49,307 INFO L225 Difference]: With dead ends: 1663 [2021-04-15 04:07:49,307 INFO L226 Difference]: Without dead ends: 1575 [2021-04-15 04:07:49,308 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3959.9ms TimeCoverageRelationStatistics Valid=361, Invalid=3545, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 04:07:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-04-15 04:07:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-04-15 04:07:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-04-15 04:07:49,322 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-04-15 04:07:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:49,322 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-04-15 04:07:49,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-04-15 04:07:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:49,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:49,324 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:49,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:49,525 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:49,525 INFO L82 PathProgramCache]: Analyzing trace with hash -720309175, now seen corresponding path program 114 times [2021-04-15 04:07:49,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:49,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595015020] [2021-04-15 04:07:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:50,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595015020] [2021-04-15 04:07:50,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113066103] [2021-04-15 04:07:50,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:50,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:07:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:07:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:07:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:51,015 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:07:51,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-04-15 04:07:51,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:51,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:51,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:51,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-04-15 04:07:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:51,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:51,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-04-15 04:07:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381133694] [2021-04-15 04:07:51,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:07:51,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:51,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:07:51,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:07:51,318 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:52,779 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:07:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:07:56,007 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-04-15 04:07:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:07:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:07:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:07:56,011 INFO L225 Difference]: With dead ends: 1683 [2021-04-15 04:07:56,011 INFO L226 Difference]: Without dead ends: 1611 [2021-04-15 04:07:56,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 4107.7ms TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:07:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-04-15 04:07:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-04-15 04:07:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-04-15 04:07:56,025 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-04-15 04:07:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:07:56,025 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-04-15 04:07:56,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:56,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-04-15 04:07:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:07:56,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:07:56,027 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:07:56,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:56,228 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:07:56,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:07:56,228 INFO L82 PathProgramCache]: Analyzing trace with hash 705933191, now seen corresponding path program 115 times [2021-04-15 04:07:56,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:07:56,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898596965] [2021-04-15 04:07:56,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:07:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:57,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898596965] [2021-04-15 04:07:57,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831150961] [2021-04-15 04:07:57,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:07:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:07:57,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:07:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:07:57,736 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:07:57,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-04-15 04:07:57,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:07:57,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:07:57,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:07:57,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-04-15 04:07:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:07:58,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:07:58,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-04-15 04:07:58,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462620770] [2021-04-15 04:07:58,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:07:58,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:07:58,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:07:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:07:58,135 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:07:59,562 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:08:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:04,278 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-04-15 04:08:04,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:08:04,281 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:04,284 INFO L225 Difference]: With dead ends: 1719 [2021-04-15 04:08:04,284 INFO L226 Difference]: Without dead ends: 1657 [2021-04-15 04:08:04,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 5205.7ms TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:08:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-04-15 04:08:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-04-15 04:08:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-04-15 04:08:04,298 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-04-15 04:08:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:04,298 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-04-15 04:08:04,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-04-15 04:08:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:04,300 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:04,300 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:04,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 04:08:04,501 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:04,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583481, now seen corresponding path program 116 times [2021-04-15 04:08:04,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:04,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366983895] [2021-04-15 04:08:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:05,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366983895] [2021-04-15 04:08:05,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889762094] [2021-04-15 04:08:05,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:05,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:08:05,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:05,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:06,177 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:08:06,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:08:06,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:06,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:06,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:06,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:08:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:06,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:06,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:06,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54186003] [2021-04-15 04:08:06,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:06,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:06,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:06,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:06,664 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:10,285 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-04-15 04:08:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:08:10,287 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:10,289 INFO L225 Difference]: With dead ends: 1608 [2021-04-15 04:08:10,289 INFO L226 Difference]: Without dead ends: 1560 [2021-04-15 04:08:10,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2990.2ms TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:08:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-04-15 04:08:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-04-15 04:08:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:10,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-04-15 04:08:10,303 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-04-15 04:08:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:10,303 INFO L480 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-04-15 04:08:10,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-04-15 04:08:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:10,305 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:10,305 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:10,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 04:08:10,527 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:10,528 INFO L82 PathProgramCache]: Analyzing trace with hash -492211767, now seen corresponding path program 117 times [2021-04-15 04:08:10,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:10,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060834980] [2021-04-15 04:08:10,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:11,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060834980] [2021-04-15 04:08:11,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296254031] [2021-04-15 04:08:11,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:11,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:08:11,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:11,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:11,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:11,989 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:08:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:08:11,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:12,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:12,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:12,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:08:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:12,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:12,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:12,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405188902] [2021-04-15 04:08:12,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:12,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:12,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:12,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:12,402 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:15,988 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-04-15 04:08:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:08:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:15,994 INFO L225 Difference]: With dead ends: 1645 [2021-04-15 04:08:15,994 INFO L226 Difference]: Without dead ends: 1597 [2021-04-15 04:08:15,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2797.5ms TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 04:08:15,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-04-15 04:08:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-04-15 04:08:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-04-15 04:08:16,009 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-04-15 04:08:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:16,009 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-04-15 04:08:16,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-04-15 04:08:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:16,010 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:16,010 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:16,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 04:08:16,211 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 893410823, now seen corresponding path program 118 times [2021-04-15 04:08:16,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:16,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604159587] [2021-04-15 04:08:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:17,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604159587] [2021-04-15 04:08:17,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449634884] [2021-04-15 04:08:17,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:17,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:08:17,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:17,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:17,815 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:08:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:08:17,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:17,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:17,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:17,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:08:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:18,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:18,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:18,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588812215] [2021-04-15 04:08:18,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:18,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:18,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:18,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:18,165 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:22,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:22,746 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-04-15 04:08:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:08:22,748 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:22,750 INFO L225 Difference]: With dead ends: 1683 [2021-04-15 04:08:22,750 INFO L226 Difference]: Without dead ends: 1635 [2021-04-15 04:08:22,751 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3219.9ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 04:08:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-04-15 04:08:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-04-15 04:08:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-04-15 04:08:22,764 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-04-15 04:08:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:22,764 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-04-15 04:08:22,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-04-15 04:08:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:22,766 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:22,766 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:22,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:22,966 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:22,967 INFO L82 PathProgramCache]: Analyzing trace with hash 252300233, now seen corresponding path program 119 times [2021-04-15 04:08:22,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:22,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109269484] [2021-04-15 04:08:22,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:23,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109269484] [2021-04-15 04:08:23,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075399307] [2021-04-15 04:08:23,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:23,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:08:23,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:23,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:24,543 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:08:24,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:08:24,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:24,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:24,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:24,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:08:25,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:25,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:25,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:25,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755710866] [2021-04-15 04:08:25,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:25,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:25,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:25,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:25,019 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:28,943 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-04-15 04:08:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:08:28,946 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:28,948 INFO L225 Difference]: With dead ends: 1716 [2021-04-15 04:08:28,948 INFO L226 Difference]: Without dead ends: 1684 [2021-04-15 04:08:28,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3458.8ms TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-04-15 04:08:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-04-15 04:08:28,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-04-15 04:08:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-04-15 04:08:28,962 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-04-15 04:08:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:28,963 INFO L480 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-04-15 04:08:28,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-04-15 04:08:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:28,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:28,964 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:29,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-04-15 04:08:29,165 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:29,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:29,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1678542599, now seen corresponding path program 120 times [2021-04-15 04:08:29,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:29,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760600334] [2021-04-15 04:08:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:29,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760600334] [2021-04-15 04:08:29,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141870628] [2021-04-15 04:08:29,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:29,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:08:29,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:29,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:30,606 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:08:30,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:08:30,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:30,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:30,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:30,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:08:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:31,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:31,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:31,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360788442] [2021-04-15 04:08:31,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:31,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:31,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:31,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:31,282 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:35,112 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-04-15 04:08:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:36,899 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-04-15 04:08:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:08:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:36,907 INFO L225 Difference]: With dead ends: 1787 [2021-04-15 04:08:36,907 INFO L226 Difference]: Without dead ends: 1743 [2021-04-15 04:08:36,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4517.5ms TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:08:36,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-04-15 04:08:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-04-15 04:08:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-04-15 04:08:36,927 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-04-15 04:08:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:36,927 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-04-15 04:08:36,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-04-15 04:08:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:36,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:36,929 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:37,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:37,145 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1040826887, now seen corresponding path program 121 times [2021-04-15 04:08:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:37,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793800439] [2021-04-15 04:08:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:37,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793800439] [2021-04-15 04:08:37,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734730690] [2021-04-15 04:08:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:38,555 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:08:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:08:38,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:38,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:38,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:38,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:08:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:39,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:39,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:39,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53904247] [2021-04-15 04:08:39,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:39,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:39,369 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:43,675 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-04-15 04:08:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 04:08:43,678 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:43,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:43,680 INFO L225 Difference]: With dead ends: 1606 [2021-04-15 04:08:43,680 INFO L226 Difference]: Without dead ends: 1578 [2021-04-15 04:08:43,680 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 3361.7ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-04-15 04:08:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-04-15 04:08:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-04-15 04:08:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-04-15 04:08:43,694 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-04-15 04:08:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:43,694 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-04-15 04:08:43,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-04-15 04:08:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:43,695 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:43,696 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:43,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 04:08:43,897 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash -777516603, now seen corresponding path program 122 times [2021-04-15 04:08:43,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:43,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875695845] [2021-04-15 04:08:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:44,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875695845] [2021-04-15 04:08:44,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067486139] [2021-04-15 04:08:44,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:44,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:08:44,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:44,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:44,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:45,627 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:08:45,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:08:45,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:45,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:45,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:45,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:08:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:46,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:46,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:46,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461796839] [2021-04-15 04:08:46,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:46,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:46,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:46,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:46,153 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:50,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:08:50,556 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-04-15 04:08:50,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 04:08:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:08:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:08:50,563 INFO L225 Difference]: With dead ends: 1650 [2021-04-15 04:08:50,563 INFO L226 Difference]: Without dead ends: 1554 [2021-04-15 04:08:50,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 4212.7ms TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-04-15 04:08:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-04-15 04:08:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-04-15 04:08:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-04-15 04:08:50,580 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-04-15 04:08:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:08:50,580 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-04-15 04:08:50,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-04-15 04:08:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:08:50,581 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:08:50,582 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:08:50,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 04:08:50,782 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:08:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:08:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash 608105987, now seen corresponding path program 123 times [2021-04-15 04:08:50,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:08:50,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744511586] [2021-04-15 04:08:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:08:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:08:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:51,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744511586] [2021-04-15 04:08:51,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036449760] [2021-04-15 04:08:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:08:51,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:08:51,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:08:51,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:08:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:08:52,571 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:08:52,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:08:52,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:08:52,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:08:52,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:08:52,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:08:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:08:53,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:08:53,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:08:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068090094] [2021-04-15 04:08:53,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:08:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:08:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:08:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:08:53,108 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:08:56,222 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-04-15 04:08:57,392 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-04-15 04:09:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:09:00,527 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-04-15 04:09:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:09:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:09:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:09:00,533 INFO L225 Difference]: With dead ends: 1712 [2021-04-15 04:09:00,533 INFO L226 Difference]: Without dead ends: 1617 [2021-04-15 04:09:00,534 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 5133.7ms TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:09:00,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-04-15 04:09:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-04-15 04:09:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-04-15 04:09:00,547 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-04-15 04:09:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:09:00,547 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-04-15 04:09:00,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-04-15 04:09:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:09:00,549 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:09:00,549 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:09:00,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-04-15 04:09:00,751 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:09:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:09:00,751 INFO L82 PathProgramCache]: Analyzing trace with hash -33004603, now seen corresponding path program 124 times [2021-04-15 04:09:00,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:09:00,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171055575] [2021-04-15 04:09:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:09:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171055575] [2021-04-15 04:09:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327274420] [2021-04-15 04:09:01,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:01,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:09:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:09:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:09:01,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:09:02,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:09:02,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:09:02,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:09:02,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:09:02,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:09:02,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:09:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:03,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:09:03,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:09:03,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041841092] [2021-04-15 04:09:03,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:09:03,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:09:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:09:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:09:03,286 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:05,615 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-04-15 04:09:06,265 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:09:06,821 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:09:07,303 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-04-15 04:09:09,704 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:09:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:09:10,889 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-04-15 04:09:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 04:09:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:09:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:09:10,895 INFO L225 Difference]: With dead ends: 1736 [2021-04-15 04:09:10,895 INFO L226 Difference]: Without dead ends: 1656 [2021-04-15 04:09:10,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 6059.5ms TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:09:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-04-15 04:09:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-04-15 04:09:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-04-15 04:09:10,909 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-04-15 04:09:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:09:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-04-15 04:09:10,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-04-15 04:09:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:09:10,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:09:10,911 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:09:11,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:11,113 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:09:11,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:09:11,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1393237763, now seen corresponding path program 125 times [2021-04-15 04:09:11,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:09:11,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683439105] [2021-04-15 04:09:11,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:09:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:12,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683439105] [2021-04-15 04:09:12,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893089955] [2021-04-15 04:09:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:12,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:09:12,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:09:12,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:09:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:09:12,830 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:09:12,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:09:12,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:09:12,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:09:12,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:09:12,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:09:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:13,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:09:13,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:09:13,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194942244] [2021-04-15 04:09:13,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:09:13,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:09:13,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:09:13,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:09:13,374 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:16,906 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 04:09:17,083 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:09:17,554 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:09:18,148 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:09:19,389 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:09:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:09:22,841 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-04-15 04:09:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 04:09:22,845 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:09:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:09:22,848 INFO L225 Difference]: With dead ends: 1806 [2021-04-15 04:09:22,848 INFO L226 Difference]: Without dead ends: 1747 [2021-04-15 04:09:22,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 6431.6ms TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 04:09:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-04-15 04:09:22,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-04-15 04:09:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-04-15 04:09:22,863 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-04-15 04:09:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:09:22,863 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-04-15 04:09:22,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-04-15 04:09:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:09:22,864 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:09:22,865 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:09:23,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:23,065 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:09:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:09:23,066 INFO L82 PathProgramCache]: Analyzing trace with hash 478605017, now seen corresponding path program 126 times [2021-04-15 04:09:23,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:09:23,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203351816] [2021-04-15 04:09:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:09:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:23,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203351816] [2021-04-15 04:09:23,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615661248] [2021-04-15 04:09:23,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:23,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:09:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:09:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 04:09:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:09:24,731 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:09:24,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:09:24,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:09:24,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:09:24,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:09:24,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-04-15 04:09:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:25,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:09:25,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:09:25,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710757717] [2021-04-15 04:09:25,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:09:25,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:09:25,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:09:25,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:09:25,547 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:29,556 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:09:29,912 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-04-15 04:09:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:09:33,226 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-04-15 04:09:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:09:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:09:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:09:33,231 INFO L225 Difference]: With dead ends: 1678 [2021-04-15 04:09:33,231 INFO L226 Difference]: Without dead ends: 1619 [2021-04-15 04:09:33,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 5663.6ms TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:09:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-04-15 04:09:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-04-15 04:09:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-04-15 04:09:33,246 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-04-15 04:09:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:09:33,246 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-04-15 04:09:33,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-04-15 04:09:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:09:33,258 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:09:33,258 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:09:33,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:33,459 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:09:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:09:33,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1104831497, now seen corresponding path program 127 times [2021-04-15 04:09:33,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:09:33,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490574444] [2021-04-15 04:09:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:09:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490574444] [2021-04-15 04:09:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376537799] [2021-04-15 04:09:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:09:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:09:35,524 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:09:35,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:09:35,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:09:35,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:09:35,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:09:35,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:09:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:36,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:09:36,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:09:36,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032987639] [2021-04-15 04:09:36,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:09:36,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:09:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:09:36,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:09:36,140 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:37,091 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-04-15 04:09:40,040 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-04-15 04:09:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:09:42,451 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-04-15 04:09:42,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-04-15 04:09:42,453 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:09:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:09:42,456 INFO L225 Difference]: With dead ends: 1719 [2021-04-15 04:09:42,456 INFO L226 Difference]: Without dead ends: 1623 [2021-04-15 04:09:42,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 4843.0ms TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:09:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-04-15 04:09:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-04-15 04:09:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-04-15 04:09:42,471 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-04-15 04:09:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:09:42,471 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-04-15 04:09:42,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-04-15 04:09:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:09:42,472 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:09:42,473 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:09:42,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-04-15 04:09:42,673 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:09:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:09:42,674 INFO L82 PathProgramCache]: Analyzing trace with hash 280791093, now seen corresponding path program 128 times [2021-04-15 04:09:42,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:09:42,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368916341] [2021-04-15 04:09:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:09:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:43,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368916341] [2021-04-15 04:09:43,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368000205] [2021-04-15 04:09:43,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:43,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:09:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:09:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:09:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:09:44,962 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:09:44,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:09:44,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:09:44,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:09:44,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:09:44,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:09:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:45,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:09:45,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:09:45,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210986597] [2021-04-15 04:09:45,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:09:45,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:09:45,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:09:45,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:09:45,519 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:48,817 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-04-15 04:09:49,369 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-04-15 04:09:49,898 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-04-15 04:09:50,090 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-04-15 04:09:50,277 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-04-15 04:09:51,957 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-04-15 04:09:53,596 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:09:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:09:54,651 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-04-15 04:09:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-04-15 04:09:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:09:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:09:54,658 INFO L225 Difference]: With dead ends: 1837 [2021-04-15 04:09:54,658 INFO L226 Difference]: Without dead ends: 1735 [2021-04-15 04:09:54,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 6666.0ms TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:09:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-04-15 04:09:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-04-15 04:09:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-04-15 04:09:54,673 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-04-15 04:09:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:09:54,674 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-04-15 04:09:54,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:09:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-04-15 04:09:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:09:54,675 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:09:54,676 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:09:54,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:54,876 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:09:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:09:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash -360319497, now seen corresponding path program 129 times [2021-04-15 04:09:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:09:54,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075767090] [2021-04-15 04:09:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:09:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:09:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:56,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075767090] [2021-04-15 04:09:56,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053320107] [2021-04-15 04:09:56,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:09:56,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:09:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:09:56,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:09:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:09:57,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:09:57,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:09:57,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:09:57,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:09:57,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:09:57,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:09:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:09:57,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:09:57,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:09:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252538168] [2021-04-15 04:09:57,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:09:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:09:57,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:09:57,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:09:57,790 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:00,936 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:10:01,426 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-04-15 04:10:01,817 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-04-15 04:10:02,772 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:10:03,019 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:10:03,222 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:10:03,739 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:10:04,565 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-04-15 04:10:04,829 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-04-15 04:10:05,058 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-04-15 04:10:05,505 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-04-15 04:10:06,027 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2021-04-15 04:10:06,826 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:10:07,983 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:10:11,214 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-04-15 04:10:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:10:11,475 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-04-15 04:10:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 04:10:11,480 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:10:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:10:11,482 INFO L225 Difference]: With dead ends: 1994 [2021-04-15 04:10:11,482 INFO L226 Difference]: Without dead ends: 1895 [2021-04-15 04:10:11,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 9497.2ms TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-04-15 04:10:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-04-15 04:10:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-04-15 04:10:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-04-15 04:10:11,499 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-04-15 04:10:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:10:11,499 INFO L480 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-04-15 04:10:11,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-04-15 04:10:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:10:11,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:10:11,501 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:10:11,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 04:10:11,702 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:10:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:10:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1065922869, now seen corresponding path program 130 times [2021-04-15 04:10:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:10:11,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302067894] [2021-04-15 04:10:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:10:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:10:12,018 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:10:12,164 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 04:10:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:12,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302067894] [2021-04-15 04:10:12,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523727641] [2021-04-15 04:10:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:12,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:10:12,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:10:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:10:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:10:13,920 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:10:13,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:10:13,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:10:13,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:10:13,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:10:13,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:10:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:10:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:10:14,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052264636] [2021-04-15 04:10:14,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:10:14,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:10:14,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:10:14,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:10:14,762 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:18,002 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-04-15 04:10:18,178 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:10:18,682 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-04-15 04:10:18,911 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 04:10:19,115 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:10:19,321 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2021-04-15 04:10:20,287 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-04-15 04:10:20,537 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-04-15 04:10:21,281 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:10:21,506 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:10:21,734 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-04-15 04:10:22,382 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-04-15 04:10:23,240 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-04-15 04:10:24,487 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:10:24,810 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:10:25,398 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-04-15 04:10:25,697 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 04:10:25,968 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-04-15 04:10:26,324 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:10:27,196 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-04-15 04:10:27,787 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-04-15 04:10:28,187 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-04-15 04:10:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:10:30,608 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-04-15 04:10:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-04-15 04:10:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:10:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:10:30,613 INFO L225 Difference]: With dead ends: 2110 [2021-04-15 04:10:30,613 INFO L226 Difference]: Without dead ends: 2048 [2021-04-15 04:10:30,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 10789.8ms TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-04-15 04:10:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-04-15 04:10:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-04-15 04:10:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-04-15 04:10:30,630 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-04-15 04:10:30,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:10:30,630 INFO L480 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-04-15 04:10:30,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:30,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-04-15 04:10:30,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:10:30,631 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:10:30,631 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:10:30,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:30,832 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:10:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:10:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash 151290123, now seen corresponding path program 131 times [2021-04-15 04:10:30,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:10:30,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104878315] [2021-04-15 04:10:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:10:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:10:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:31,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104878315] [2021-04-15 04:10:31,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754702819] [2021-04-15 04:10:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:31,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:10:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:10:31,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:10:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:10:32,632 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:10:32,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:10:32,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:10:32,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:10:32,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:10:32,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:10:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:33,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:10:33,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:10:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550470277] [2021-04-15 04:10:33,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:10:33,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:10:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:10:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:10:33,363 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:35,970 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:10:36,455 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:10:37,172 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-04-15 04:10:37,356 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-04-15 04:10:38,671 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:10:41,140 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:10:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:10:42,289 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-04-15 04:10:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-04-15 04:10:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:10:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:10:42,295 INFO L225 Difference]: With dead ends: 1992 [2021-04-15 04:10:42,295 INFO L226 Difference]: Without dead ends: 1936 [2021-04-15 04:10:42,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5978.2ms TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:10:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-04-15 04:10:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-04-15 04:10:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-04-15 04:10:42,314 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-04-15 04:10:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:10:42,314 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-04-15 04:10:42,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-04-15 04:10:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:10:42,316 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:10:42,316 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:10:42,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:42,533 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:10:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:10:42,533 INFO L82 PathProgramCache]: Analyzing trace with hash 154706401, now seen corresponding path program 132 times [2021-04-15 04:10:42,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:10:42,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952458236] [2021-04-15 04:10:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:10:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:10:42,935 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 04:10:43,092 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:10:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:43,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952458236] [2021-04-15 04:10:43,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251885380] [2021-04-15 04:10:43,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:43,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:10:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:10:43,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 04:10:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:10:44,974 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:10:44,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:10:44,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:10:45,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:10:45,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:10:45,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-04-15 04:10:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:45,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:10:45,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-04-15 04:10:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755041754] [2021-04-15 04:10:45,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:10:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:10:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:10:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:10:45,676 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:48,055 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:10:48,654 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:10:50,559 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-04-15 04:10:50,840 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:10:51,220 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:10:51,670 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-04-15 04:10:51,909 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-04-15 04:10:52,347 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:10:52,808 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-04-15 04:10:53,362 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:10:53,695 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:10:56,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:10:56,378 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-04-15 04:10:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 04:10:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:10:56,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:10:56,385 INFO L225 Difference]: With dead ends: 2256 [2021-04-15 04:10:56,385 INFO L226 Difference]: Without dead ends: 2168 [2021-04-15 04:10:56,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 7797.1ms TimeCoverageRelationStatistics Valid=525, Invalid=5481, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 04:10:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-04-15 04:10:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-04-15 04:10:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-04-15 04:10:56,414 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-04-15 04:10:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:10:56,414 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-04-15 04:10:56,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:10:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-04-15 04:10:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:10:56,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:10:56,416 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:10:56,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:56,617 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:10:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:10:56,617 INFO L82 PathProgramCache]: Analyzing trace with hash -486404189, now seen corresponding path program 133 times [2021-04-15 04:10:56,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:10:56,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518031518] [2021-04-15 04:10:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:10:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:10:56,926 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:10:57,072 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 04:10:57,227 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:10:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518031518] [2021-04-15 04:10:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331087394] [2021-04-15 04:10:57,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:10:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:10:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:10:57,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:10:59,046 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:10:59,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:10:59,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:10:59,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:10:59,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:10:59,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:10:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:10:59,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:10:59,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:10:59,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766481607] [2021-04-15 04:10:59,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:10:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:10:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:10:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:10:59,746 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:01,690 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:11:02,232 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:11:03,599 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:11:03,783 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-04-15 04:11:04,853 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:11:05,064 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-04-15 04:11:05,440 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:11:05,838 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-04-15 04:11:06,065 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 04:11:06,450 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:11:06,950 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:11:07,316 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:11:08,185 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:11:09,059 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:11:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:11:11,917 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-04-15 04:11:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-04-15 04:11:11,921 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:11:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:11:11,924 INFO L225 Difference]: With dead ends: 2485 [2021-04-15 04:11:11,924 INFO L226 Difference]: Without dead ends: 2405 [2021-04-15 04:11:11,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 9605.1ms TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-04-15 04:11:11,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-04-15 04:11:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-04-15 04:11:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-04-15 04:11:11,942 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-04-15 04:11:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:11:11,943 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-04-15 04:11:11,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-04-15 04:11:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:11:11,944 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:11:11,944 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:11:12,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-04-15 04:11:12,145 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:11:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:11:12,145 INFO L82 PathProgramCache]: Analyzing trace with hash 939838177, now seen corresponding path program 134 times [2021-04-15 04:11:12,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:11:12,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150616212] [2021-04-15 04:11:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:11:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:11:12,455 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:11:12,613 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 04:11:12,763 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:11:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:13,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150616212] [2021-04-15 04:11:13,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357395367] [2021-04-15 04:11:13,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:11:13,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:11:13,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:11:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:11:13,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:11:14,491 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:11:14,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:11:14,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:11:14,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:11:14,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:11:14,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:11:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:15,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:11:15,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:11:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465378152] [2021-04-15 04:11:15,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:11:15,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:11:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:11:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:11:15,345 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:17,699 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:11:18,497 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:11:19,437 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:11:19,903 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:11:20,118 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2021-04-15 04:11:21,030 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-04-15 04:11:21,349 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-04-15 04:11:21,548 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2021-04-15 04:11:22,512 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-04-15 04:11:23,303 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:11:23,642 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:11:24,688 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:11:24,929 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:11:25,211 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:11:25,669 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:11:25,893 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:11:26,870 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-04-15 04:11:27,207 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-04-15 04:11:27,521 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-04-15 04:11:28,568 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-04-15 04:11:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:11:29,454 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-04-15 04:11:29,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-04-15 04:11:29,460 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:11:29,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:11:29,463 INFO L225 Difference]: With dead ends: 2226 [2021-04-15 04:11:29,463 INFO L226 Difference]: Without dead ends: 2170 [2021-04-15 04:11:29,464 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 10871.0ms TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-04-15 04:11:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-04-15 04:11:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-04-15 04:11:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-04-15 04:11:29,479 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-04-15 04:11:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:11:29,479 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-04-15 04:11:29,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-04-15 04:11:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:11:29,481 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:11:29,481 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:11:29,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:11:29,682 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:11:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:11:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash 834991559, now seen corresponding path program 135 times [2021-04-15 04:11:29,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:11:29,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728252032] [2021-04-15 04:11:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:11:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:11:30,075 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-04-15 04:11:30,245 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:11:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:30,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728252032] [2021-04-15 04:11:30,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005155741] [2021-04-15 04:11:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:11:31,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:11:31,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:11:31,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:11:31,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:11:32,010 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:11:32,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:11:32,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:11:32,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:11:32,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:11:32,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:11:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:32,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:11:32,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:11:32,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226179264] [2021-04-15 04:11:32,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:11:32,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:11:32,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:11:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:11:32,867 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:34,930 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:11:35,586 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-04-15 04:11:36,401 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2021-04-15 04:11:36,711 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:11:37,520 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-04-15 04:11:37,739 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-04-15 04:11:39,594 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:11:40,824 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-04-15 04:11:42,620 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-04-15 04:11:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:11:42,685 INFO L93 Difference]: Finished difference Result 2035 states and 4093 transitions. [2021-04-15 04:11:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:11:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:11:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:11:42,693 INFO L225 Difference]: With dead ends: 2035 [2021-04-15 04:11:42,693 INFO L226 Difference]: Without dead ends: 1979 [2021-04-15 04:11:42,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 7477.6ms TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2021-04-15 04:11:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-04-15 04:11:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1471. [2021-04-15 04:11:42,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0258503401360546) internal successors, (2978), 1470 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2978 transitions. [2021-04-15 04:11:42,708 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2978 transitions. Word has length 33 [2021-04-15 04:11:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:11:42,708 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 2978 transitions. [2021-04-15 04:11:42,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2978 transitions. [2021-04-15 04:11:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:11:42,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:11:42,710 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:11:42,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-04-15 04:11:42,910 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:11:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:11:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2101647219, now seen corresponding path program 136 times [2021-04-15 04:11:42,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:11:42,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791888701] [2021-04-15 04:11:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:11:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:11:43,184 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-04-15 04:11:43,331 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:11:43,497 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 04:11:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:44,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791888701] [2021-04-15 04:11:44,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873179129] [2021-04-15 04:11:44,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:11:44,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:11:44,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:11:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:11:44,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:11:45,699 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:11:45,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:11:45,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:11:45,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:11:45,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:11:45,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:11:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:46,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:11:46,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:11:46,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12062921] [2021-04-15 04:11:46,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:11:46,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:11:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:11:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:11:46,367 INFO L87 Difference]: Start difference. First operand 1471 states and 2978 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:48,888 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:11:49,588 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-04-15 04:11:49,957 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-04-15 04:11:52,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:11:52,074 INFO L93 Difference]: Finished difference Result 1668 states and 3337 transitions. [2021-04-15 04:11:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:11:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:11:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:11:52,079 INFO L225 Difference]: With dead ends: 1668 [2021-04-15 04:11:52,079 INFO L226 Difference]: Without dead ends: 1572 [2021-04-15 04:11:52,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 5346.8ms TimeCoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:11:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-04-15 04:11:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1496. [2021-04-15 04:11:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-04-15 04:11:52,098 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-04-15 04:11:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:11:52,098 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-04-15 04:11:52,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:11:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-04-15 04:11:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:11:52,099 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:11:52,100 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:11:52,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:11:52,313 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:11:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:11:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash -716024629, now seen corresponding path program 137 times [2021-04-15 04:11:52,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:11:52,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892967006] [2021-04-15 04:11:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:11:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:11:52,606 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-04-15 04:11:52,735 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:11:52,893 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 04:11:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:53,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892967006] [2021-04-15 04:11:53,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667759816] [2021-04-15 04:11:53,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:11:53,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:11:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:11:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 04:11:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:11:54,744 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:11:54,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:11:54,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:11:54,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:11:54,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:11:54,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:11:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:11:55,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:11:55,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:11:55,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726178102] [2021-04-15 04:11:55,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:11:55,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:11:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:11:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:11:55,259 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:00,436 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-04-15 04:12:00,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:12:00,670 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-04-15 04:12:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-04-15 04:12:00,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:12:00,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:12:00,678 INFO L225 Difference]: With dead ends: 1683 [2021-04-15 04:12:00,678 INFO L226 Difference]: Without dead ends: 1595 [2021-04-15 04:12:00,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 4767.6ms TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 04:12:00,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-04-15 04:12:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1499. [2021-04-15 04:12:00,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0253671562082776) internal successors, (3034), 1498 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3034 transitions. [2021-04-15 04:12:00,692 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3034 transitions. Word has length 33 [2021-04-15 04:12:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:12:00,692 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3034 transitions. [2021-04-15 04:12:00,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3034 transitions. [2021-04-15 04:12:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:12:00,694 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:12:00,694 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:12:00,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:00,894 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:12:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:12:00,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1357135219, now seen corresponding path program 138 times [2021-04-15 04:12:00,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:12:00,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347034991] [2021-04-15 04:12:00,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:12:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:01,407 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 04:12:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:02,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347034991] [2021-04-15 04:12:02,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354965760] [2021-04-15 04:12:02,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:02,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:12:02,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:12:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:12:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:12:03,439 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:12:03,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:12:03,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:12:03,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:12:03,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:12:03,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:12:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:04,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:12:04,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:12:04,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954314381] [2021-04-15 04:12:04,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:12:04,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:12:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:12:04,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:12:04,306 INFO L87 Difference]: Start difference. First operand 1499 states and 3034 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:06,296 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:12:06,603 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:12:06,820 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-04-15 04:12:07,484 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-04-15 04:12:09,546 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2021-04-15 04:12:09,792 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 04:12:10,008 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:12:10,799 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-04-15 04:12:12,100 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-04-15 04:12:12,283 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-04-15 04:12:12,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:12:12,620 INFO L93 Difference]: Finished difference Result 1771 states and 3554 transitions. [2021-04-15 04:12:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-04-15 04:12:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:12:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:12:12,628 INFO L225 Difference]: With dead ends: 1771 [2021-04-15 04:12:12,628 INFO L226 Difference]: Without dead ends: 1675 [2021-04-15 04:12:12,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 7942.5ms TimeCoverageRelationStatistics Valid=507, Invalid=4605, Unknown=0, NotChecked=0, Total=5112 [2021-04-15 04:12:12,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-04-15 04:12:12,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1504. [2021-04-15 04:12:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 2.0246174318030605) internal successors, (3043), 1503 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 3043 transitions. [2021-04-15 04:12:12,642 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 3043 transitions. Word has length 33 [2021-04-15 04:12:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:12:12,643 INFO L480 AbstractCegarLoop]: Abstraction has 1504 states and 3043 transitions. [2021-04-15 04:12:12,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 3043 transitions. [2021-04-15 04:12:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:12:12,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:12:12,644 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:12:12,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:12,845 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:12:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:12:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash 69107147, now seen corresponding path program 139 times [2021-04-15 04:12:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:12:12,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054812594] [2021-04-15 04:12:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:12:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:13,136 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-04-15 04:12:13,299 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:12:13,486 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-04-15 04:12:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:14,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054812594] [2021-04-15 04:12:14,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417481739] [2021-04-15 04:12:14,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:14,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:12:14,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:12:15,540 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:12:15,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:12:15,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:12:15,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:12:15,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:12:15,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:12:16,418 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-04-15 04:12:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:16,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:12:16,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:12:16,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934915959] [2021-04-15 04:12:16,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:12:16,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:12:16,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:12:16,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:12:16,475 INFO L87 Difference]: Start difference. First operand 1504 states and 3043 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:18,771 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:12:19,108 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-04-15 04:12:19,304 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-04-15 04:12:20,586 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-04-15 04:12:21,228 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 23 [2021-04-15 04:12:21,835 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 14 [2021-04-15 04:12:22,357 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-04-15 04:12:22,554 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:12:22,825 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:12:23,308 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-04-15 04:12:23,814 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-04-15 04:12:24,105 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:12:24,763 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:12:25,557 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2021-04-15 04:12:25,789 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:12:26,454 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2021-04-15 04:12:26,642 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-04-15 04:12:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:12:28,628 INFO L93 Difference]: Finished difference Result 1940 states and 3886 transitions. [2021-04-15 04:12:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 04:12:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:12:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:12:28,632 INFO L225 Difference]: With dead ends: 1940 [2021-04-15 04:12:28,632 INFO L226 Difference]: Without dead ends: 1862 [2021-04-15 04:12:28,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 10003.2ms TimeCoverageRelationStatistics Valid=695, Invalid=6445, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 04:12:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-04-15 04:12:28,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1495. [2021-04-15 04:12:28,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0234270414993305) internal successors, (3023), 1494 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3023 transitions. [2021-04-15 04:12:28,644 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3023 transitions. Word has length 33 [2021-04-15 04:12:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:12:28,644 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3023 transitions. [2021-04-15 04:12:28,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:28,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3023 transitions. [2021-04-15 04:12:28,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:12:28,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:12:28,645 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:12:28,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 04:12:28,846 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:12:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:12:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -845525599, now seen corresponding path program 140 times [2021-04-15 04:12:28,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:12:28,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515761530] [2021-04-15 04:12:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:12:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515761530] [2021-04-15 04:12:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591670466] [2021-04-15 04:12:29,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:29,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:12:29,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:12:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:12:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:12:30,330 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:12:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:12:30,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:12:30,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:12:30,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:12:30,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:12:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:31,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:12:31,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-04-15 04:12:31,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785879253] [2021-04-15 04:12:31,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 04:12:31,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:12:31,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 04:12:31,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:12:31,034 INFO L87 Difference]: Start difference. First operand 1495 states and 3023 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:34,347 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-04-15 04:12:34,538 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-04-15 04:12:35,887 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-04-15 04:12:36,306 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2021-04-15 04:12:36,657 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-04-15 04:12:37,140 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:12:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:12:40,201 INFO L93 Difference]: Finished difference Result 1704 states and 3411 transitions. [2021-04-15 04:12:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:12:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:12:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:12:40,206 INFO L225 Difference]: With dead ends: 1704 [2021-04-15 04:12:40,206 INFO L226 Difference]: Without dead ends: 1642 [2021-04-15 04:12:40,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 6408.8ms TimeCoverageRelationStatistics Valid=515, Invalid=4741, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:12:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-04-15 04:12:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1472. [2021-04-15 04:12:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.025832766825289) internal successors, (2980), 1471 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2980 transitions. [2021-04-15 04:12:40,219 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2980 transitions. Word has length 33 [2021-04-15 04:12:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:12:40,219 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2980 transitions. [2021-04-15 04:12:40,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2980 transitions. [2021-04-15 04:12:40,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:12:40,221 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:12:40,221 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:12:40,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-04-15 04:12:40,421 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:12:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:12:40,422 INFO L82 PathProgramCache]: Analyzing trace with hash -349346937, now seen corresponding path program 141 times [2021-04-15 04:12:40,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:12:40,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649785874] [2021-04-15 04:12:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:12:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:40,795 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-04-15 04:12:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:41,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649785874] [2021-04-15 04:12:41,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418400145] [2021-04-15 04:12:41,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:41,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:12:41,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:12:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:12:41,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:12:42,743 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:12:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:12:42,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:12:42,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:12:42,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:12:42,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:12:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:43,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:12:43,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-04-15 04:12:43,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716425275] [2021-04-15 04:12:43,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:12:43,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:12:43,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:12:43,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:12:43,382 INFO L87 Difference]: Start difference. First operand 1472 states and 2980 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:45,635 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:12:46,090 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:12:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:12:49,638 INFO L93 Difference]: Finished difference Result 1656 states and 3314 transitions. [2021-04-15 04:12:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-04-15 04:12:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:12:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:12:49,643 INFO L225 Difference]: With dead ends: 1656 [2021-04-15 04:12:49,643 INFO L226 Difference]: Without dead ends: 1568 [2021-04-15 04:12:49,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 5663.6ms TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 04:12:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-04-15 04:12:49,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1494. [2021-04-15 04:12:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.024112525117214) internal successors, (3022), 1493 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:49,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3022 transitions. [2021-04-15 04:12:49,655 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3022 transitions. Word has length 33 [2021-04-15 04:12:49,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:12:49,656 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3022 transitions. [2021-04-15 04:12:49,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3022 transitions. [2021-04-15 04:12:49,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:12:49,657 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:12:49,657 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:12:49,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:49,857 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:12:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:12:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash -990457527, now seen corresponding path program 142 times [2021-04-15 04:12:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:12:49,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125316077] [2021-04-15 04:12:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:12:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:50,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125316077] [2021-04-15 04:12:50,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499812977] [2021-04-15 04:12:50,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:12:50,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:12:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:12:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:12:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:12:51,942 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-04-15 04:12:51,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-04-15 04:12:51,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:12:51,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:12:51,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:12:51,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-04-15 04:12:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:12:52,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:12:52,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-04-15 04:12:52,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487116224] [2021-04-15 04:12:52,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:12:52,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:12:52,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:12:52,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:12:52,661 INFO L87 Difference]: Start difference. First operand 1494 states and 3022 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:54,551 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:12:54,761 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 21 [2021-04-15 04:12:54,998 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:12:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:12:58,821 INFO L93 Difference]: Finished difference Result 1676 states and 3358 transitions. [2021-04-15 04:12:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:12:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:12:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:12:58,826 INFO L225 Difference]: With dead ends: 1676 [2021-04-15 04:12:58,826 INFO L226 Difference]: Without dead ends: 1604 [2021-04-15 04:12:58,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 5829.2ms TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 04:12:58,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-04-15 04:12:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1495. [2021-04-15 04:12:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0240963855421685) internal successors, (3024), 1494 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3024 transitions. [2021-04-15 04:12:58,838 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3024 transitions. Word has length 33 [2021-04-15 04:12:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:12:58,838 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3024 transitions. [2021-04-15 04:12:58,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:12:58,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3024 transitions. [2021-04-15 04:12:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-04-15 04:12:58,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:12:58,840 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:12:59,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-04-15 04:12:59,049 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:12:59,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:12:59,049 INFO L82 PathProgramCache]: Analyzing trace with hash 435784839, now seen corresponding path program 143 times [2021-04-15 04:12:59,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:12:59,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300009072] [2021-04-15 04:12:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:12:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:12:59,572 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:13:00,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300009072] [2021-04-15 04:13:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865053807] [2021-04-15 04:13:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:00,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:13:00,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:00,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 04:13:00,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:01,086 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-04-15 04:13:01,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-04-15 04:13:01,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:13:01,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:13:01,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:13:01,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-04-15 04:13:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:01,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:01,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-04-15 04:13:01,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858159538] [2021-04-15 04:13:01,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-04-15 04:13:01,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-04-15 04:13:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-04-15 04:13:01,748 INFO L87 Difference]: Start difference. First operand 1495 states and 3024 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:03,758 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-04-15 04:13:04,199 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:13:05,822 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-04-15 04:13:06,107 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-04-15 04:13:07,369 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-04-15 04:13:08,499 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:13:09,093 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-04-15 04:13:09,740 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:13:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:09,941 INFO L93 Difference]: Finished difference Result 1714 states and 3440 transitions. [2021-04-15 04:13:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-04-15 04:13:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-04-15 04:13:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:09,947 INFO L225 Difference]: With dead ends: 1714 [2021-04-15 04:13:09,947 INFO L226 Difference]: Without dead ends: 1652 [2021-04-15 04:13:09,947 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 7174.1ms TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:13:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-04-15 04:13:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1462. [2021-04-15 04:13:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.027378507871321) internal successors, (2962), 1461 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2962 transitions. [2021-04-15 04:13:09,959 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2962 transitions. Word has length 33 [2021-04-15 04:13:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:09,959 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 2962 transitions. [2021-04-15 04:13:09,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:09,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2962 transitions. [2021-04-15 04:13:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 04:13:09,960 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:09,960 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:10,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 04:13:10,161 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:10,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1387234304, now seen corresponding path program 144 times [2021-04-15 04:13:10,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:10,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897941750] [2021-04-15 04:13:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:10,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897941750] [2021-04-15 04:13:10,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208290374] [2021-04-15 04:13:10,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:10,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:13:10,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:10,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:13:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:11,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:13:11,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-04-15 04:13:11,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:13:11,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:13:11,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:13:11,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-04-15 04:13:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:11,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:11,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-04-15 04:13:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444860643] [2021-04-15 04:13:11,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:13:11,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:13:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:13:11,197 INFO L87 Difference]: Start difference. First operand 1462 states and 2962 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:13,043 INFO L93 Difference]: Finished difference Result 1948 states and 3909 transitions. [2021-04-15 04:13:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 04:13:13,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 04:13:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:13,048 INFO L225 Difference]: With dead ends: 1948 [2021-04-15 04:13:13,049 INFO L226 Difference]: Without dead ends: 1945 [2021-04-15 04:13:13,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1422.2ms TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:13:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-04-15 04:13:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1350. [2021-04-15 04:13:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.0148257968865826) internal successors, (2718), 1349 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2718 transitions. [2021-04-15 04:13:13,061 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2718 transitions. Word has length 36 [2021-04-15 04:13:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:13,061 INFO L480 AbstractCegarLoop]: Abstraction has 1350 states and 2718 transitions. [2021-04-15 04:13:13,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2718 transitions. [2021-04-15 04:13:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-04-15 04:13:13,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:13,062 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:13,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 04:13:13,262 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:13,263 INFO L82 PathProgramCache]: Analyzing trace with hash 783776818, now seen corresponding path program 145 times [2021-04-15 04:13:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:13,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992030435] [2021-04-15 04:13:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:13,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992030435] [2021-04-15 04:13:13,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047249706] [2021-04-15 04:13:13,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:13,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:13:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:13,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:13,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-04-15 04:13:13,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142223500] [2021-04-15 04:13:13,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 04:13:13,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 04:13:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:13:13,703 INFO L87 Difference]: Start difference. First operand 1350 states and 2718 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:13,772 INFO L93 Difference]: Finished difference Result 1454 states and 2886 transitions. [2021-04-15 04:13:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 04:13:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-04-15 04:13:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:13,777 INFO L225 Difference]: With dead ends: 1454 [2021-04-15 04:13:13,777 INFO L226 Difference]: Without dead ends: 1399 [2021-04-15 04:13:13,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-04-15 04:13:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-04-15 04:13:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1357. [2021-04-15 04:13:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.0088495575221237) internal successors, (2724), 1356 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2724 transitions. [2021-04-15 04:13:13,787 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2724 transitions. Word has length 37 [2021-04-15 04:13:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:13,788 INFO L480 AbstractCegarLoop]: Abstraction has 1357 states and 2724 transitions. [2021-04-15 04:13:13,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2724 transitions. [2021-04-15 04:13:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:13:13,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:13,789 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:13,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:13,989 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2072843805, now seen corresponding path program 146 times [2021-04-15 04:13:13,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:13,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529818655] [2021-04-15 04:13:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:15,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529818655] [2021-04-15 04:13:15,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143876116] [2021-04-15 04:13:15,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:15,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:13:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:15,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:13:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:16,257 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-04-15 04:13:16,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-04-15 04:13:16,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:13:16,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:13:16,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:13:16,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-04-15 04:13:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:16,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:16,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-04-15 04:13:16,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413250473] [2021-04-15 04:13:16,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 04:13:16,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 04:13:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:13:16,874 INFO L87 Difference]: Start difference. First operand 1357 states and 2724 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:20,348 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:13:21,307 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-04-15 04:13:21,867 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:13:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:23,004 INFO L93 Difference]: Finished difference Result 1551 states and 3062 transitions. [2021-04-15 04:13:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 04:13:23,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:13:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:23,009 INFO L225 Difference]: With dead ends: 1551 [2021-04-15 04:13:23,009 INFO L226 Difference]: Without dead ends: 1487 [2021-04-15 04:13:23,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 4949.7ms TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2021-04-15 04:13:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-04-15 04:13:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1374. [2021-04-15 04:13:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.0043699927166787) internal successors, (2752), 1373 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2752 transitions. [2021-04-15 04:13:23,019 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2752 transitions. Word has length 40 [2021-04-15 04:13:23,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:23,019 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 2752 transitions. [2021-04-15 04:13:23,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2752 transitions. [2021-04-15 04:13:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:13:23,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:23,021 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:23,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:23,221 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1011750747, now seen corresponding path program 147 times [2021-04-15 04:13:23,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:23,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511223624] [2021-04-15 04:13:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:24,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511223624] [2021-04-15 04:13:24,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133873639] [2021-04-15 04:13:24,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:24,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 04:13:24,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:24,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-04-15 04:13:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:26,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:13:26,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:13:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:13:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:13:26,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-04-15 04:13:26,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:13:26,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:13:26,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:13:26,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-04-15 04:13:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:27,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:27,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-04-15 04:13:27,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971503112] [2021-04-15 04:13:27,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:13:27,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:27,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:13:27,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:13:27,143 INFO L87 Difference]: Start difference. First operand 1374 states and 2752 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:30,123 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-04-15 04:13:31,842 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 04:13:32,479 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-04-15 04:13:33,429 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-04-15 04:13:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:34,714 INFO L93 Difference]: Finished difference Result 1579 states and 3117 transitions. [2021-04-15 04:13:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-04-15 04:13:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:13:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:34,718 INFO L225 Difference]: With dead ends: 1579 [2021-04-15 04:13:34,718 INFO L226 Difference]: Without dead ends: 1515 [2021-04-15 04:13:34,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6482.6ms TimeCoverageRelationStatistics Valid=313, Invalid=3847, Unknown=0, NotChecked=0, Total=4160 [2021-04-15 04:13:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-04-15 04:13:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1380. [2021-04-15 04:13:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.0065264684554025) internal successors, (2767), 1379 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2767 transitions. [2021-04-15 04:13:34,729 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2767 transitions. Word has length 40 [2021-04-15 04:13:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:34,729 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 2767 transitions. [2021-04-15 04:13:34,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2767 transitions. [2021-04-15 04:13:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:13:34,730 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:34,730 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:34,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-04-15 04:13:34,931 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash -666824675, now seen corresponding path program 148 times [2021-04-15 04:13:34,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:34,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162951152] [2021-04-15 04:13:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:36,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162951152] [2021-04-15 04:13:36,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201992022] [2021-04-15 04:13:36,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:36,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:13:36,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:36,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:13:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:38,306 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-04-15 04:13:38,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-04-15 04:13:38,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:13:38,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:13:38,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:13:38,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-04-15 04:13:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:38,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:38,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-04-15 04:13:38,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047698970] [2021-04-15 04:13:38,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:13:38,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:13:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:13:38,950 INFO L87 Difference]: Start difference. First operand 1380 states and 2767 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:13:46,098 INFO L93 Difference]: Finished difference Result 1604 states and 3165 transitions. [2021-04-15 04:13:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 04:13:46,101 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:13:46,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:13:46,103 INFO L225 Difference]: With dead ends: 1604 [2021-04-15 04:13:46,103 INFO L226 Difference]: Without dead ends: 1540 [2021-04-15 04:13:46,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 6132.5ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:13:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-04-15 04:13:46,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1381. [2021-04-15 04:13:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.006521739130435) internal successors, (2769), 1380 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2769 transitions. [2021-04-15 04:13:46,115 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2769 transitions. Word has length 40 [2021-04-15 04:13:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:13:46,115 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2769 transitions. [2021-04-15 04:13:46,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2769 transitions. [2021-04-15 04:13:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:13:46,116 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:13:46,116 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:13:46,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:46,317 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:13:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:13:46,317 INFO L82 PathProgramCache]: Analyzing trace with hash -252990117, now seen corresponding path program 149 times [2021-04-15 04:13:46,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:13:46,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923349629] [2021-04-15 04:13:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:13:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:13:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923349629] [2021-04-15 04:13:48,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589589685] [2021-04-15 04:13:48,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:13:48,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:13:48,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:13:48,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:13:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:13:49,723 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:13:49,909 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 04:13:49,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-04-15 04:13:49,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:13:49,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:13:49,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:13:49,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-04-15 04:13:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:13:50,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:13:50,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 37 [2021-04-15 04:13:50,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148044165] [2021-04-15 04:13:50,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 04:13:50,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:13:50,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 04:13:50,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 04:13:50,663 INFO L87 Difference]: Start difference. First operand 1381 states and 2769 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:13:56,236 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-04-15 04:13:57,490 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:13:58,034 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:14:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:00,425 INFO L93 Difference]: Finished difference Result 1645 states and 3248 transitions. [2021-04-15 04:14:00,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-04-15 04:14:00,429 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:14:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:00,430 INFO L225 Difference]: With dead ends: 1645 [2021-04-15 04:14:00,430 INFO L226 Difference]: Without dead ends: 1581 [2021-04-15 04:14:00,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 6879.1ms TimeCoverageRelationStatistics Valid=269, Invalid=3513, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 04:14:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-04-15 04:14:00,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1385. [2021-04-15 04:14:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.0065028901734103) internal successors, (2777), 1384 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 2777 transitions. [2021-04-15 04:14:00,441 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 2777 transitions. Word has length 40 [2021-04-15 04:14:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:00,442 INFO L480 AbstractCegarLoop]: Abstraction has 1385 states and 2777 transitions. [2021-04-15 04:14:00,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 2777 transitions. [2021-04-15 04:14:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:14:00,443 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:00,443 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:00,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:00,643 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash -924554723, now seen corresponding path program 150 times [2021-04-15 04:14:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:00,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936266870] [2021-04-15 04:14:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:02,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936266870] [2021-04-15 04:14:02,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756126563] [2021-04-15 04:14:02,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:02,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:14:02,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:02,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:14:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:03,498 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-04-15 04:14:03,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-04-15 04:14:03,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:14:03,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:14:03,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:14:03,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-04-15 04:14:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:04,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:04,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-04-15 04:14:04,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932965917] [2021-04-15 04:14:04,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:14:04,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:04,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:14:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:14:04,032 INFO L87 Difference]: Start difference. First operand 1385 states and 2777 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:08,367 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:14:12,077 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:14:12,493 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2021-04-15 04:14:13,227 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:14:13,671 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-04-15 04:14:15,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:15,154 INFO L93 Difference]: Finished difference Result 1660 states and 3278 transitions. [2021-04-15 04:14:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-04-15 04:14:15,158 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:14:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:15,160 INFO L225 Difference]: With dead ends: 1660 [2021-04-15 04:14:15,160 INFO L226 Difference]: Without dead ends: 1612 [2021-04-15 04:14:15,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 6994.5ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 04:14:15,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-04-15 04:14:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1386. [2021-04-15 04:14:15,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.0064981949458485) internal successors, (2779), 1385 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2779 transitions. [2021-04-15 04:14:15,172 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2779 transitions. Word has length 40 [2021-04-15 04:14:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:15,172 INFO L480 AbstractCegarLoop]: Abstraction has 1386 states and 2779 transitions. [2021-04-15 04:14:15,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2779 transitions. [2021-04-15 04:14:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:14:15,174 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:15,174 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:15,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:15,374 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash 461067867, now seen corresponding path program 151 times [2021-04-15 04:14:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:15,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53240142] [2021-04-15 04:14:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:17,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53240142] [2021-04-15 04:14:17,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897734682] [2021-04-15 04:14:17,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:17,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:14:17,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:18,096 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-04-15 04:14:18,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-04-15 04:14:18,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:14:18,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:14:18,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:14:18,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-04-15 04:14:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:18,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:18,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-04-15 04:14:18,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525118877] [2021-04-15 04:14:18,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:14:18,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:18,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:14:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:14:18,590 INFO L87 Difference]: Start difference. First operand 1386 states and 2779 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:22,468 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2021-04-15 04:14:22,649 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 04:14:25,747 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-04-15 04:14:26,573 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:14:26,838 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-04-15 04:14:27,346 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:14:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:29,410 INFO L93 Difference]: Finished difference Result 1719 states and 3396 transitions. [2021-04-15 04:14:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-04-15 04:14:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:14:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:29,416 INFO L225 Difference]: With dead ends: 1719 [2021-04-15 04:14:29,416 INFO L226 Difference]: Without dead ends: 1659 [2021-04-15 04:14:29,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 7407.0ms TimeCoverageRelationStatistics Valid=353, Invalid=4617, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 04:14:29,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-04-15 04:14:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1393. [2021-04-15 04:14:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.0064655172413794) internal successors, (2793), 1392 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2793 transitions. [2021-04-15 04:14:29,429 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2793 transitions. Word has length 40 [2021-04-15 04:14:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:29,429 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 2793 transitions. [2021-04-15 04:14:29,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2793 transitions. [2021-04-15 04:14:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:14:29,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:29,430 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:29,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:29,630 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:29,631 INFO L82 PathProgramCache]: Analyzing trace with hash -180042723, now seen corresponding path program 152 times [2021-04-15 04:14:29,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:29,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578508127] [2021-04-15 04:14:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:31,313 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578508127] [2021-04-15 04:14:31,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663074279] [2021-04-15 04:14:31,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:31,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:14:31,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:31,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:14:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:32,633 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-04-15 04:14:32,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-04-15 04:14:32,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:14:32,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:14:32,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:14:32,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-04-15 04:14:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:33,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:33,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-04-15 04:14:33,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251934238] [2021-04-15 04:14:33,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 04:14:33,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:33,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 04:14:33,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 04:14:33,494 INFO L87 Difference]: Start difference. First operand 1393 states and 2793 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:36,530 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:14:37,183 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-04-15 04:14:40,139 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:14:40,622 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-04-15 04:14:40,831 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-04-15 04:14:41,355 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-04-15 04:14:41,798 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-04-15 04:14:42,152 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-04-15 04:14:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:14:43,595 INFO L93 Difference]: Finished difference Result 1712 states and 3382 transitions. [2021-04-15 04:14:43,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-04-15 04:14:43,600 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:14:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:14:43,601 INFO L225 Difference]: With dead ends: 1712 [2021-04-15 04:14:43,601 INFO L226 Difference]: Without dead ends: 1680 [2021-04-15 04:14:43,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 8045.9ms TimeCoverageRelationStatistics Valid=384, Invalid=4872, Unknown=0, NotChecked=0, Total=5256 [2021-04-15 04:14:43,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-04-15 04:14:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1394. [2021-04-15 04:14:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 2.0064608758076097) internal successors, (2795), 1393 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2795 transitions. [2021-04-15 04:14:43,613 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2795 transitions. Word has length 40 [2021-04-15 04:14:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:14:43,613 INFO L480 AbstractCegarLoop]: Abstraction has 1394 states and 2795 transitions. [2021-04-15 04:14:43,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2795 transitions. [2021-04-15 04:14:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:14:43,615 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:14:43,615 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:14:43,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:43,815 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:14:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:14:43,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1246199643, now seen corresponding path program 153 times [2021-04-15 04:14:43,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:14:43,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613600500] [2021-04-15 04:14:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:14:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:14:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:45,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613600500] [2021-04-15 04:14:45,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936529066] [2021-04-15 04:14:45,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:14:45,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:14:45,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:14:45,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-04-15 04:14:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:14:47,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:14:47,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:14:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:14:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:14:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:14:47,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:14:47,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2021-04-15 04:14:47,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:14:47,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:14:47,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:14:47,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:25 [2021-04-15 04:14:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:14:49,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:14:49,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 40 [2021-04-15 04:14:49,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235043994] [2021-04-15 04:14:49,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-04-15 04:14:49,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:14:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-04-15 04:14:49,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2021-04-15 04:14:49,204 INFO L87 Difference]: Start difference. First operand 1394 states and 2795 transitions. Second operand has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:14:53,067 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-04-15 04:14:53,490 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-04-15 04:14:54,408 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-04-15 04:14:54,614 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:14:57,108 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 04:14:57,405 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-04-15 04:14:57,639 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:14:58,674 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-04-15 04:14:58,929 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-04-15 04:14:59,328 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-04-15 04:14:59,714 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-04-15 04:15:00,911 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-04-15 04:15:01,931 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:15:02,416 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-04-15 04:15:02,746 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-04-15 04:15:03,595 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-04-15 04:15:04,044 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-04-15 04:15:04,797 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-04-15 04:15:05,760 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-04-15 04:15:06,325 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-04-15 04:15:06,916 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-04-15 04:15:07,461 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-04-15 04:15:07,736 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-04-15 04:15:08,225 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:15:08,598 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-04-15 04:15:09,174 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 15 [2021-04-15 04:15:09,501 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-04-15 04:15:09,922 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-04-15 04:15:10,606 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-04-15 04:15:11,046 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 22 [2021-04-15 04:15:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:12,532 INFO L93 Difference]: Finished difference Result 1780 states and 3513 transitions. [2021-04-15 04:15:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-04-15 04:15:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:15:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:12,537 INFO L225 Difference]: With dead ends: 1780 [2021-04-15 04:15:12,537 INFO L226 Difference]: Without dead ends: 1734 [2021-04-15 04:15:12,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 16121.0ms TimeCoverageRelationStatistics Valid=666, Invalid=9234, Unknown=0, NotChecked=0, Total=9900 [2021-04-15 04:15:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-04-15 04:15:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1399. [2021-04-15 04:15:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1398 states have (on average 2.0085836909871246) internal successors, (2808), 1398 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 2808 transitions. [2021-04-15 04:15:12,557 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 2808 transitions. Word has length 40 [2021-04-15 04:15:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:12,557 INFO L480 AbstractCegarLoop]: Abstraction has 1399 states and 2808 transitions. [2021-04-15 04:15:12,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 2808 transitions. [2021-04-15 04:15:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:15:12,558 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:12,558 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:12,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:12,758 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:12,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1566768791, now seen corresponding path program 154 times [2021-04-15 04:15:12,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102815057] [2021-04-15 04:15:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:14,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102815057] [2021-04-15 04:15:14,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123441249] [2021-04-15 04:15:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:14,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:15:14,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:14,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:15:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:16,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:16,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:16,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:15:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-04-15 04:15:16,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:15:16,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:15:16,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:15:16,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-04-15 04:15:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-04-15 04:15:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203747080] [2021-04-15 04:15:17,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:15:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:17,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:15:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:15:17,608 INFO L87 Difference]: Start difference. First operand 1399 states and 2808 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:21,372 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:15:22,541 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:15:23,033 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:15:23,558 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:15:23,926 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-04-15 04:15:24,206 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-04-15 04:15:24,629 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-04-15 04:15:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:26,290 INFO L93 Difference]: Finished difference Result 1516 states and 3019 transitions. [2021-04-15 04:15:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:15:26,298 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:15:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:26,299 INFO L225 Difference]: With dead ends: 1516 [2021-04-15 04:15:26,299 INFO L226 Difference]: Without dead ends: 1475 [2021-04-15 04:15:26,300 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 7061.3ms TimeCoverageRelationStatistics Valid=221, Invalid=2859, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:15:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-04-15 04:15:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1396. [2021-04-15 04:15:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 2.0064516129032257) internal successors, (2799), 1395 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 2799 transitions. [2021-04-15 04:15:26,314 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 2799 transitions. Word has length 40 [2021-04-15 04:15:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:26,314 INFO L480 AbstractCegarLoop]: Abstraction has 1396 states and 2799 transitions. [2021-04-15 04:15:26,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 2799 transitions. [2021-04-15 04:15:26,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:15:26,316 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:26,316 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:26,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:26,516 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:26,516 INFO L82 PathProgramCache]: Analyzing trace with hash 925658201, now seen corresponding path program 155 times [2021-04-15 04:15:26,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:26,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500506811] [2021-04-15 04:15:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:28,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500506811] [2021-04-15 04:15:28,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056801911] [2021-04-15 04:15:28,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:28,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:15:28,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 04:15:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:30,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:30,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:30,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:30,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:30,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:15:30,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-04-15 04:15:30,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:15:30,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:15:30,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:15:30,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:13 [2021-04-15 04:15:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:31,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:31,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-04-15 04:15:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497151817] [2021-04-15 04:15:31,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:15:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:15:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:15:31,585 INFO L87 Difference]: Start difference. First operand 1396 states and 2799 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:34,428 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:15:35,521 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:15:35,988 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-04-15 04:15:36,524 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:15:36,894 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-04-15 04:15:37,185 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-04-15 04:15:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:38,799 INFO L93 Difference]: Finished difference Result 1523 states and 3034 transitions. [2021-04-15 04:15:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:15:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:15:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:38,806 INFO L225 Difference]: With dead ends: 1523 [2021-04-15 04:15:38,806 INFO L226 Difference]: Without dead ends: 1494 [2021-04-15 04:15:38,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 7052.3ms TimeCoverageRelationStatistics Valid=240, Invalid=2840, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:15:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-04-15 04:15:38,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1393. [2021-04-15 04:15:38,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.0064655172413794) internal successors, (2793), 1392 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2793 transitions. [2021-04-15 04:15:38,818 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2793 transitions. Word has length 40 [2021-04-15 04:15:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:38,818 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 2793 transitions. [2021-04-15 04:15:38,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2793 transitions. [2021-04-15 04:15:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:15:38,820 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:38,820 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:39,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:39,020 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:39,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:39,020 INFO L82 PathProgramCache]: Analyzing trace with hash -214369713, now seen corresponding path program 156 times [2021-04-15 04:15:39,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:39,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370392684] [2021-04-15 04:15:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370392684] [2021-04-15 04:15:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648993102] [2021-04-15 04:15:41,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:41,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:15:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:15:41,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:15:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:43,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:43,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:15:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-04-15 04:15:43,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:15:43,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:15:43,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:15:43,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-04-15 04:15:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:44,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:44,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-04-15 04:15:44,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852516805] [2021-04-15 04:15:44,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:15:44,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:15:44,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:15:44,298 INFO L87 Difference]: Start difference. First operand 1393 states and 2793 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:48,067 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:15:49,473 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:15:49,986 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-04-15 04:15:50,471 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:15:50,873 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-04-15 04:15:52,050 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-04-15 04:15:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:15:53,110 INFO L93 Difference]: Finished difference Result 1521 states and 3030 transitions. [2021-04-15 04:15:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 04:15:53,116 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:15:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:15:53,117 INFO L225 Difference]: With dead ends: 1521 [2021-04-15 04:15:53,117 INFO L226 Difference]: Without dead ends: 1492 [2021-04-15 04:15:53,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 7279.0ms TimeCoverageRelationStatistics Valid=227, Invalid=2853, Unknown=0, NotChecked=0, Total=3080 [2021-04-15 04:15:53,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-04-15 04:15:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1391. [2021-04-15 04:15:53,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 2.0064748201438847) internal successors, (2789), 1390 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2789 transitions. [2021-04-15 04:15:53,130 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2789 transitions. Word has length 40 [2021-04-15 04:15:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:15:53,130 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2789 transitions. [2021-04-15 04:15:53,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:15:53,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2789 transitions. [2021-04-15 04:15:53,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:15:53,132 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:15:53,132 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:15:53,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-04-15 04:15:53,334 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:15:53,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:15:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2047913347, now seen corresponding path program 157 times [2021-04-15 04:15:53,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:15:53,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087553358] [2021-04-15 04:15:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:15:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087553358] [2021-04-15 04:15:55,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483376527] [2021-04-15 04:15:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:15:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:15:55,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:15:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:15:57,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:57,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:15:57,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:15:57,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-04-15 04:15:57,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:15:57,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:15:57,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:15:57,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-04-15 04:15:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:15:58,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:15:58,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-04-15 04:15:58,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901755818] [2021-04-15 04:15:58,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:15:58,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:15:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:15:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:15:58,602 INFO L87 Difference]: Start difference. First operand 1391 states and 2789 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:02,501 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-04-15 04:16:03,908 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-04-15 04:16:04,411 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-04-15 04:16:04,945 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-04-15 04:16:05,343 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-04-15 04:16:06,143 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-04-15 04:16:06,444 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-04-15 04:16:07,458 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-04-15 04:16:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:16:08,353 INFO L93 Difference]: Finished difference Result 1521 states and 3030 transitions. [2021-04-15 04:16:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:16:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 04:16:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:16:08,360 INFO L225 Difference]: With dead ends: 1521 [2021-04-15 04:16:08,360 INFO L226 Difference]: Without dead ends: 1493 [2021-04-15 04:16:08,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 7836.3ms TimeCoverageRelationStatistics Valid=235, Invalid=3071, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 04:16:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-04-15 04:16:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1384. [2021-04-15 04:16:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.0065075921908893) internal successors, (2775), 1383 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2775 transitions. [2021-04-15 04:16:08,373 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2775 transitions. Word has length 40 [2021-04-15 04:16:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:16:08,373 INFO L480 AbstractCegarLoop]: Abstraction has 1384 states and 2775 transitions. [2021-04-15 04:16:08,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2775 transitions. [2021-04-15 04:16:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 04:16:08,374 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:16:08,374 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:16:08,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:08,576 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:16:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:16:08,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1924564705, now seen corresponding path program 158 times [2021-04-15 04:16:08,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:16:08,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563171793] [2021-04-15 04:16:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:16:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:16:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:10,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563171793] [2021-04-15 04:16:10,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824027962] [2021-04-15 04:16:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:10,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:16:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:16:10,766 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-04-15 04:16:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:16:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:16:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:16:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:16:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:16:13,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-04-15 04:16:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-04-15 04:16:13,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-04-15 04:16:13,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 04:16:13,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 04:16:13,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 04:16:13,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-04-15 04:16:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:16:14,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:16:14,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-04-15 04:16:14,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77831656] [2021-04-15 04:16:14,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-04-15 04:16:14,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:16:14,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-04-15 04:16:14,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:16:14,044 INFO L87 Difference]: Start difference. First operand 1384 states and 2775 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:16:17,890 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-04-15 04:16:18,071 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-04-15 04:16:18,670 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:16:19,634 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-04-15 04:16:20,387 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-04-15 04:16:21,279 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 Received shutdown request... [2021-04-15 04:16:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:16:21,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:16:21,706 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 04:16:21,709 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 04:16:21,710 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:16:21 BasicIcfg [2021-04-15 04:16:21,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:16:21,710 INFO L168 Benchmark]: Toolchain (without parser) took 849836.21 ms. Allocated memory was 255.9 MB in the beginning and 465.6 MB in the end (delta: 209.7 MB). Free memory was 237.0 MB in the beginning and 308.1 MB in the end (delta: -71.2 MB). Peak memory consumption was 138.6 MB. Max. memory is 16.0 GB. [2021-04-15 04:16:21,710 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:16:21,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.70 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:16:21,710 INFO L168 Benchmark]: Boogie Preprocessor took 15.44 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.3 MB in the end (delta: 961.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:16:21,710 INFO L168 Benchmark]: RCFGBuilder took 238.13 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 237.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.0 GB. [2021-04-15 04:16:21,710 INFO L168 Benchmark]: TraceAbstraction took 849557.11 ms. Allocated memory was 255.9 MB in the beginning and 465.6 MB in the end (delta: 209.7 MB). Free memory was 236.9 MB in the beginning and 308.1 MB in the end (delta: -71.2 MB). Peak memory consumption was 137.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:16:21,710 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.70 ms. Allocated memory is still 255.9 MB. Free memory was 236.8 MB in the beginning and 235.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.44 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.3 MB in the end (delta: 961.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 238.13 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 237.7 MB in the end (delta: -3.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 849557.11 ms. Allocated memory was 255.9 MB in the beginning and 465.6 MB in the end (delta: 209.7 MB). Free memory was 236.9 MB in the beginning and 308.1 MB in the end (delta: -71.2 MB). Peak memory consumption was 137.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 60). Cancelled while BasicCegarLoop was constructing difference of abstraction (1384states) and FLOYD_HOARE automaton (currently 26 states, 37 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 50 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 849483.6ms, OverallIterations: 162, TraceHistogramMax: 4, EmptinessCheckTime: 206.6ms, AutomataDifference: 584893.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8079 SDtfs, 24272 SDslu, 105691 SDs, 0 SdLazy, 227483 SolverSat, 10921 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 112712.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12534 GetRequests, 3115 SyntacticMatches, 425 SemanticMatches, 8993 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159966 ImplicationChecksByTransitivity, 471010.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1988occurred in iteration=136, InterpolantAutomatonStates: 6626, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1532.6ms AutomataMinimizationTime, 161 MinimizatonAttempts, 25579 StatesRemovedByMinimization, 160 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 526.8ms SsaConstructionTime, 1729.2ms SatisfiabilityAnalysisTime, 224952.3ms InterpolantComputationTime, 10439 NumberOfCodeBlocks, 10439 NumberOfCodeBlocksAsserted, 511 NumberOfCheckSat, 10117 ConstructedInterpolants, 565 QuantifiedInterpolants, 161208 SizeOfPredicates, 1369 NumberOfNonLiveVariables, 11495 ConjunctsInSsa, 5207 ConjunctsInUnsatCore, 322 InterpolantComputations, 2 PerfectInterpolantSequences, 100/6349 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown