/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:53:50,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:53:50,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:53:50,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:53:50,983 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 [2021-06-12 21:53:51,019 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:53:51,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:53:51,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:53:51,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:53:51,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:53:51,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:53:51,023 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:53:51,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:53:51,023 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:53:51,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:53:51,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:53:51,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:53:51,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:53:51,025 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:53:51,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:53:51,025 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:53:51,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:53:51,025 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:53:51,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:53:51,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:53:51,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:53:51,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:53:51,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:53:51,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:53:51,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:53:51,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:53:51,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:53:51,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:53:51,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:53:51,027 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:53:51,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:53:51,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:53:51,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:53:51,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:53:51,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:53:51,368 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:53:51,369 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:53:51,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2021-06-12 21:53:51,370 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2021-06-12 21:53:51,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:53:51,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:53:51,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:53:51,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:53:51,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:53:51,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:53:51,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:53:51,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:53:51,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:53:51,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/1) ... [2021-06-12 21:53:51,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:53:51,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:53:51,460 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:53:51,460 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:53:51,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (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 [2021-06-12 21:53:51,531 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:53:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:53:51,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:53:51,532 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:53:51,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:53:51,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:53:51,533 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:53:51,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:53:51,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:53:51,534 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:53:51,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:53:51,718 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:53:51,720 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:53:51 BoogieIcfgContainer [2021-06-12 21:53:51,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:53:51,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:53:51,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:53:51,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:53:51,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:53:51" (1/2) ... [2021-06-12 21:53:51,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd2d1d3 and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:53:51, skipping insertion in model container [2021-06-12 21:53:51,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:53:51" (2/2) ... [2021-06-12 21:53:51,727 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2021-06-12 21:53:51,745 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:53:51,745 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:53:51,745 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:53:51,746 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:53:51,788 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 21:53:51,807 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 21:53:51,840 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:53:51,840 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:53:51,840 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:53:51,840 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:53:51,840 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:53:51,840 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:53:51,840 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:53:51,841 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:53:51,849 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-12 21:53:51,874 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 21:53:51,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:51,882 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:51,883 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-12 21:53:51,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:51,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416009728] [2021-06-12 21:53:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:52,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:52,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416009728] [2021-06-12 21:53:52,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416009728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:53:52,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:53:52,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:53:52,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184374621] [2021-06-12 21:53:52,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:53:52,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:53:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:53:52,043 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:52,065 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-12 21:53:52,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:53:52,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 21:53:52,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:52,075 INFO L225 Difference]: With dead ends: 104 [2021-06-12 21:53:52,075 INFO L226 Difference]: Without dead ends: 87 [2021-06-12 21:53:52,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:53:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-12 21:53:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-12 21:53:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-12 21:53:52,110 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-12 21:53:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:52,110 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-12 21:53:52,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-12 21:53:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:53:52,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:52,111 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:52,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:53:52,112 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-12 21:53:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:52,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444168584] [2021-06-12 21:53:52,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:52,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:52,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444168584] [2021-06-12 21:53:52,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444168584] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:53:52,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:53:52,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:53:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608666748] [2021-06-12 21:53:52,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 21:53:52,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 21:53:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:53:52,167 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:52,205 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-12 21:53:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 21:53:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 21:53:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:52,207 INFO L225 Difference]: With dead ends: 91 [2021-06-12 21:53:52,207 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 21:53:52,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 21:53:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 21:53:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-12 21:53:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-12 21:53:52,218 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-12 21:53:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:52,218 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-12 21:53:52,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-12 21:53:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 21:53:52,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:52,219 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:52,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 21:53:52,220 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-12 21:53:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:52,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266556704] [2021-06-12 21:53:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:52,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:52,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266556704] [2021-06-12 21:53:52,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266556704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:52,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445429371] [2021-06-12 21:53:52,368 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 [2021-06-12 21:53:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:53:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:52,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-12 21:53:52,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:52,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:52,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:52,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-12 21:53:52,688 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 [2021-06-12 21:53:52,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:52,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:52,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:52,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-12 21:53:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:52,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445429371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:52,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:52,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 21:53:52,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165903526] [2021-06-12 21:53:52,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:53:52,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:52,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:53:52,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:53:52,745 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:52,886 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-12 21:53:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 21:53:52,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 21:53:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:52,887 INFO L225 Difference]: With dead ends: 154 [2021-06-12 21:53:52,888 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 21:53:52,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:53:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 21:53:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-12 21:53:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-12 21:53:52,898 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-12 21:53:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:52,898 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-12 21:53:52,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-12 21:53:52,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 21:53:52,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:52,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:53,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 21:53:53,124 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:53,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-12 21:53:53,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:53,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556285850] [2021-06-12 21:53:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:53,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556285850] [2021-06-12 21:53:53,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556285850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:53,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177812183] [2021-06-12 21:53:53,177 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 [2021-06-12 21:53:53,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:53:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 21:53:53,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:53,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:53,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177812183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:53,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:53,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-12 21:53:53,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83944677] [2021-06-12 21:53:53,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:53:53,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:53:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:53:53,285 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-06-12 21:53:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:53,365 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-12 21:53:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:53:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 27 [2021-06-12 21:53:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:53,367 INFO L225 Difference]: With dead ends: 284 [2021-06-12 21:53:53,367 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 21:53:53,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-12 21:53:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 21:53:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-12 21:53:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-12 21:53:53,382 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-12 21:53:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:53,382 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-12 21:53:53,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-06-12 21:53:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-12 21:53:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:53,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:53,384 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:53,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:53,585 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:53,586 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-12 21:53:53,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:53,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514295216] [2021-06-12 21:53:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:53,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:53,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514295216] [2021-06-12 21:53:53,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514295216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:53,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829226059] [2021-06-12 21:53:53,874 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 [2021-06-12 21:53:53,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:53:53,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:53:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:54,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:54,199 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 27 [2021-06-12 21:53:54,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:54,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:54,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:54,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-12 21:53:54,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:54,440 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 20 treesize of output 38 [2021-06-12 21:53:54,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:53:54,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:54,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:54,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-12 21:53:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:54,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829226059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:54,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:54,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-12 21:53:54,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387613351] [2021-06-12 21:53:54,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:53:54,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:53:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:53:54,608 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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) [2021-06-12 21:53:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:56,490 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-12 21:53:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:53:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:56,496 INFO L225 Difference]: With dead ends: 650 [2021-06-12 21:53:56,496 INFO L226 Difference]: Without dead ends: 573 [2021-06-12 21:53:56,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1565.8ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:53:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-12 21:53:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-12 21:53:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-12 21:53:56,519 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-12 21:53:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:56,519 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-12 21:53:56,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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) [2021-06-12 21:53:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-12 21:53:56,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:56,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:56,526 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:56,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:56,745 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-12 21:53:56,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:56,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415838620] [2021-06-12 21:53:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:53:56,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:56,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415838620] [2021-06-12 21:53:56,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415838620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:56,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797211417] [2021-06-12 21:53:56,973 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 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 [2021-06-12 21:53:57,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:53:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:53:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:57,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:57,313 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 26 treesize of output 26 [2021-06-12 21:53:57,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:57,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:57,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:57,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-12 21:53:57,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:57,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:57,427 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 24 treesize of output 10 [2021-06-12 21:53:57,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:57,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:57,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:57,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-12 21:53:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:57,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797211417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:57,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:57,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-12 21:53:57,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017759770] [2021-06-12 21:53:57,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:53:57,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:53:57,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:53:57,453 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:58,207 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-12 21:53:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:53:58,207 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:58,211 INFO L225 Difference]: With dead ends: 1023 [2021-06-12 21:53:58,211 INFO L226 Difference]: Without dead ends: 878 [2021-06-12 21:53:58,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:53:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-12 21:53:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-12 21:53:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-12 21:53:58,228 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-12 21:53:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:58,229 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-12 21:53:58,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-12 21:53:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:58,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:58,230 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:53:58,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:53:58,445 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:53:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:53:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-12 21:53:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:53:58,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750498539] [2021-06-12 21:53:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:53:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:53:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:58,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:53:58,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750498539] [2021-06-12 21:53:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750498539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:58,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611720702] [2021-06-12 21:53:58,692 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 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 [2021-06-12 21:53:58,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:53:58,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:53:58,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 21:53:58,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:53:58,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:58,979 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 24 treesize of output 24 [2021-06-12 21:53:58,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:58,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:58,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:53:58,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-12 21:53:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:53:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:53:59,107 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 22 treesize of output 10 [2021-06-12 21:53:59,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:53:59,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:53:59,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:53:59,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-12 21:53:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:53:59,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611720702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:53:59,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:53:59,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-12 21:53:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445336502] [2021-06-12 21:53:59,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:53:59,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:53:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:53:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:53:59,127 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:59,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:53:59,936 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-12 21:53:59,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:53:59,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:53:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:53:59,941 INFO L225 Difference]: With dead ends: 1081 [2021-06-12 21:53:59,941 INFO L226 Difference]: Without dead ends: 927 [2021-06-12 21:53:59,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:53:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-12 21:53:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-12 21:53:59,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-12 21:53:59,956 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-12 21:53:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:53:59,956 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-12 21:53:59,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:53:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-12 21:53:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:53:59,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:53:59,957 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:00,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:54:00,180 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:00,181 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-12 21:54:00,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:00,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944799463] [2021-06-12 21:54:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:00,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:00,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:00,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944799463] [2021-06-12 21:54:00,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944799463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:00,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888436819] [2021-06-12 21:54:00,389 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 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 [2021-06-12 21:54:00,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 21:54:00,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 21:54:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:00,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:00,689 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 24 treesize of output 24 [2021-06-12 21:54:00,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:00,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:00,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:00,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:18 [2021-06-12 21:54:00,741 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 21:54:00,742 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 22 treesize of output 10 [2021-06-12 21:54:00,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:00,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:00,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:00,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:5 [2021-06-12 21:54:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:00,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888436819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:00,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:00,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 21:54:00,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761061725] [2021-06-12 21:54:00,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:54:00,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:00,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:54:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:54:00,765 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:01,574 INFO L93 Difference]: Finished difference Result 1050 states and 2217 transitions. [2021-06-12 21:54:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:54:01,574 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:54:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:01,578 INFO L225 Difference]: With dead ends: 1050 [2021-06-12 21:54:01,578 INFO L226 Difference]: Without dead ends: 939 [2021-06-12 21:54:01,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 782.3ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:54:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-12 21:54:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 482. [2021-06-12 21:54:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-06-12 21:54:01,594 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 32 [2021-06-12 21:54:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:01,595 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-06-12 21:54:01,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-06-12 21:54:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:54:01,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:01,596 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:01,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:01,819 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-12 21:54:01,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:01,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566557678] [2021-06-12 21:54:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:02,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566557678] [2021-06-12 21:54:02,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566557678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102447228] [2021-06-12 21:54:02,029 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 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 [2021-06-12 21:54:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 21:54:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:02,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:02,317 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 26 treesize of output 26 [2021-06-12 21:54:02,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:02,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:02,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:02,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-12 21:54:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:02,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:02,445 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 24 treesize of output 10 [2021-06-12 21:54:02,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:02,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:02,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:02,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-12 21:54:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102447228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:02,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:02,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-12 21:54:02,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933166057] [2021-06-12 21:54:02,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:54:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:54:02,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:54:02,467 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:03,046 INFO L93 Difference]: Finished difference Result 1045 states and 2215 transitions. [2021-06-12 21:54:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 21:54:03,046 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 21:54:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:03,050 INFO L225 Difference]: With dead ends: 1045 [2021-06-12 21:54:03,050 INFO L226 Difference]: Without dead ends: 947 [2021-06-12 21:54:03,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 548.6ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:54:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-12 21:54:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 464. [2021-06-12 21:54:03,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.1576673866090714) internal successors, (999), 463 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 999 transitions. [2021-06-12 21:54:03,063 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 999 transitions. Word has length 32 [2021-06-12 21:54:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:03,063 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 999 transitions. [2021-06-12 21:54:03,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 999 transitions. [2021-06-12 21:54:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 21:54:03,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:03,065 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:03,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:03,281 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-12 21:54:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:03,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389179806] [2021-06-12 21:54:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:03,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389179806] [2021-06-12 21:54:03,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389179806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:03,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184118903] [2021-06-12 21:54:03,341 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 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 [2021-06-12 21:54:03,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:03,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:03,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 21:54:03,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:03,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184118903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:03,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:03,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-12 21:54:03,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393457035] [2021-06-12 21:54:03,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:54:03,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:54:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:54:03,469 INFO L87 Difference]: Start difference. First operand 464 states and 999 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) [2021-06-12 21:54:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:03,540 INFO L93 Difference]: Finished difference Result 882 states and 1900 transitions. [2021-06-12 21:54:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 21:54:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 36 [2021-06-12 21:54:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:03,544 INFO L225 Difference]: With dead ends: 882 [2021-06-12 21:54:03,544 INFO L226 Difference]: Without dead ends: 844 [2021-06-12 21:54:03,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:54:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-12 21:54:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 713. [2021-06-12 21:54:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.182584269662921) internal successors, (1554), 712 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1554 transitions. [2021-06-12 21:54:03,561 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1554 transitions. Word has length 36 [2021-06-12 21:54:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:03,561 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 1554 transitions. [2021-06-12 21:54:03,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) [2021-06-12 21:54:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1554 transitions. [2021-06-12 21:54:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:03,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:03,563 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:03,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 21:54:03,777 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-12 21:54:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:03,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896507927] [2021-06-12 21:54:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:04,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:04,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896507927] [2021-06-12 21:54:04,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896507927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:04,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872577061] [2021-06-12 21:54:04,152 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 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 [2021-06-12 21:54:04,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:54:04,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:04,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 21:54:04,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:04,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:04,486 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 45 treesize of output 53 [2021-06-12 21:54:04,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:04,532 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.5 percent of original size [2021-06-12 21:54:04,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:04,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:52 [2021-06-12 21:54:04,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:04,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:04,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:04,836 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-12 21:54:04,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:54:04,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:04,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:04,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-12 21:54:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872577061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:04,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:04,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-12 21:54:04,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853919649] [2021-06-12 21:54:04,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 21:54:04,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:04,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 21:54:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:54:04,939 INFO L87 Difference]: Start difference. First operand 713 states and 1554 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:08,566 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-12 21:54:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-12 21:54:08,566 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:08,576 INFO L225 Difference]: With dead ends: 2812 [2021-06-12 21:54:08,576 INFO L226 Difference]: Without dead ends: 2548 [2021-06-12 21:54:08,579 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 3021.0ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-12 21:54:08,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-12 21:54:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-12 21:54:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-12 21:54:08,606 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-12 21:54:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:08,606 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-12 21:54:08,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-12 21:54:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:08,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:08,608 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:08,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:08,831 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:08,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:08,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-12 21:54:08,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:08,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815353444] [2021-06-12 21:54:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:09,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:09,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815353444] [2021-06-12 21:54:09,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815353444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:09,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14726644] [2021-06-12 21:54:09,155 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 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 [2021-06-12 21:54:09,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:09,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:54:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:09,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:09,900 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 52 [2021-06-12 21:54:09,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:09,956 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-12 21:54:09,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:09,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-12 21:54:10,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:10,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:10,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:10,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-12 21:54:10,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:10,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:10,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:10,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-12 21:54:10,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:10,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:10,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:10,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-12 21:54:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:10,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14726644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:10,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:10,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-12 21:54:10,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919818276] [2021-06-12 21:54:10,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:54:10,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:10,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:54:10,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:54:10,333 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:12,566 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-12 21:54:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:54:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:12,573 INFO L225 Difference]: With dead ends: 2302 [2021-06-12 21:54:12,573 INFO L226 Difference]: Without dead ends: 2145 [2021-06-12 21:54:12,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1769.6ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:54:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-12 21:54:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-12 21:54:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-12 21:54:12,599 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-12 21:54:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:12,599 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-12 21:54:12,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-12 21:54:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:12,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:12,601 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:12,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 21:54:12,817 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:12,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-12 21:54:12,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:12,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257808160] [2021-06-12 21:54:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:13,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:13,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257808160] [2021-06-12 21:54:13,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257808160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:13,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612495245] [2021-06-12 21:54:13,152 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 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 [2021-06-12 21:54:13,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:54:13,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:13,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 21:54:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:13,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:13,774 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 40 treesize of output 50 [2021-06-12 21:54:13,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:13,824 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.7 percent of original size [2021-06-12 21:54:13,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:13,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:29 [2021-06-12 21:54:13,909 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 21:54:13,909 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 33 treesize of output 13 [2021-06-12 21:54:13,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:13,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:13,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:13,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:5 [2021-06-12 21:54:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:13,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612495245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:13,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:13,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-06-12 21:54:13,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613203497] [2021-06-12 21:54:13,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 21:54:13,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 21:54:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:54:13,928 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:16,097 INFO L93 Difference]: Finished difference Result 2428 states and 5151 transitions. [2021-06-12 21:54:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:54:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:16,102 INFO L225 Difference]: With dead ends: 2428 [2021-06-12 21:54:16,102 INFO L226 Difference]: Without dead ends: 2232 [2021-06-12 21:54:16,103 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1715.7ms TimeCoverageRelationStatistics Valid=593, Invalid=4519, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 21:54:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-12 21:54:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 956. [2021-06-12 21:54:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.1382198952879583) internal successors, (2042), 955 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:16,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2042 transitions. [2021-06-12 21:54:16,127 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2042 transitions. Word has length 41 [2021-06-12 21:54:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:16,127 INFO L482 AbstractCegarLoop]: Abstraction has 956 states and 2042 transitions. [2021-06-12 21:54:16,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2042 transitions. [2021-06-12 21:54:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:16,129 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:16,129 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:16,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:54:16,352 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:16,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:16,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-12 21:54:16,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:16,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139985858] [2021-06-12 21:54:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:16,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139985858] [2021-06-12 21:54:16,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139985858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:16,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054066790] [2021-06-12 21:54:16,713 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 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 [2021-06-12 21:54:16,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:54:16,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:16,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 21:54:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:17,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:17,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2021-06-12 21:54:17,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:17,644 INFO L628 ElimStorePlain]: treesize reduction 197, result has 27.3 percent of original size [2021-06-12 21:54:17,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:17,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:53, output treesize:47 [2021-06-12 21:54:18,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:18,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 63 [2021-06-12 21:54:18,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:54:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:18,359 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-12 21:54:18,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 1 [2021-06-12 21:54:18,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:18,386 INFO L628 ElimStorePlain]: treesize reduction 21, result has 54.3 percent of original size [2021-06-12 21:54:18,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:18,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:21 [2021-06-12 21:54:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:18,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054066790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:18,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:18,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-12 21:54:18,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912204877] [2021-06-12 21:54:18,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:54:18,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:18,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:54:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:54:18,475 INFO L87 Difference]: Start difference. First operand 956 states and 2042 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:20,044 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-12 21:54:32,132 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-12 21:54:33,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:33,530 INFO L93 Difference]: Finished difference Result 4013 states and 8575 transitions. [2021-06-12 21:54:33,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-06-12 21:54:33,530 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:33,541 INFO L225 Difference]: With dead ends: 4013 [2021-06-12 21:54:33,542 INFO L226 Difference]: Without dead ends: 3813 [2021-06-12 21:54:33,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11305 ImplicationChecksByTransitivity, 11744.7ms TimeCoverageRelationStatistics Valid=3722, Invalid=26380, Unknown=0, NotChecked=0, Total=30102 [2021-06-12 21:54:33,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-12 21:54:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 1122. [2021-06-12 21:54:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.145405887600357) internal successors, (2405), 1121 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2405 transitions. [2021-06-12 21:54:33,577 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2405 transitions. Word has length 41 [2021-06-12 21:54:33,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:33,577 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 2405 transitions. [2021-06-12 21:54:33,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:33,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2405 transitions. [2021-06-12 21:54:33,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:33,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:33,579 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:33,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:33,793 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:33,794 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-12 21:54:33,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:33,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042204821] [2021-06-12 21:54:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042204821] [2021-06-12 21:54:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042204821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347711176] [2021-06-12 21:54:34,103 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 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 [2021-06-12 21:54:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:54:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:34,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,739 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 52 [2021-06-12 21:54:34,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:34,780 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-12 21:54:34,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:34,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-12 21:54:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-12 21:54:34,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:34,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:34,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:34,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-12 21:54:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:34,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347711176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:34,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:34,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-12 21:54:34,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143371694] [2021-06-12 21:54:34,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 21:54:34,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:34,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 21:54:34,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 21:54:34,880 INFO L87 Difference]: Start difference. First operand 1122 states and 2405 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:36,991 INFO L93 Difference]: Finished difference Result 4028 states and 8625 transitions. [2021-06-12 21:54:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:54:36,991 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:36,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:37,002 INFO L225 Difference]: With dead ends: 4028 [2021-06-12 21:54:37,002 INFO L226 Difference]: Without dead ends: 3805 [2021-06-12 21:54:37,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1499.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:54:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-06-12 21:54:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1424. [2021-06-12 21:54:37,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.1377371749824317) internal successors, (3042), 1423 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3042 transitions. [2021-06-12 21:54:37,036 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3042 transitions. Word has length 41 [2021-06-12 21:54:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:37,036 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3042 transitions. [2021-06-12 21:54:37,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3042 transitions. [2021-06-12 21:54:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:37,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:37,038 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:37,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 21:54:37,253 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:37,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-12 21:54:37,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:37,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599408566] [2021-06-12 21:54:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:37,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:37,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599408566] [2021-06-12 21:54:37,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599408566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:37,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549427830] [2021-06-12 21:54:37,650 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 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 [2021-06-12 21:54:37,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:37,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:37,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:54:37,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:38,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:38,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 52 [2021-06-12 21:54:38,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:38,384 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-12 21:54:38,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:38,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-12 21:54:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-12 21:54:38,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:38,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:38,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:38,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-12 21:54:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549427830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:38,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:38,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-12 21:54:38,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312156513] [2021-06-12 21:54:38,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 21:54:38,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 21:54:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:54:38,577 INFO L87 Difference]: Start difference. First operand 1424 states and 3042 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:40,822 INFO L93 Difference]: Finished difference Result 4414 states and 9437 transitions. [2021-06-12 21:54:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:54:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:40,829 INFO L225 Difference]: With dead ends: 4414 [2021-06-12 21:54:40,830 INFO L226 Difference]: Without dead ends: 4155 [2021-06-12 21:54:40,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1872.0ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:54:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-12 21:54:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 1776. [2021-06-12 21:54:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.150985915492958) internal successors, (3818), 1775 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 3818 transitions. [2021-06-12 21:54:40,869 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 3818 transitions. Word has length 41 [2021-06-12 21:54:40,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:40,870 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 3818 transitions. [2021-06-12 21:54:40,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:40,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 3818 transitions. [2021-06-12 21:54:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 21:54:40,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:40,873 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:41,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:41,089 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-12 21:54:41,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:41,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428489661] [2021-06-12 21:54:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:41,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:41,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428489661] [2021-06-12 21:54:41,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428489661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:41,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547149343] [2021-06-12 21:54:41,444 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 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 [2021-06-12 21:54:41,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:54:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 21:54:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:41,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:41,902 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 40 treesize of output 50 [2021-06-12 21:54:41,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:41,951 INFO L628 ElimStorePlain]: treesize reduction 43, result has 60.2 percent of original size [2021-06-12 21:54:41,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:41,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:37 [2021-06-12 21:54:42,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,322 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-12 21:54:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-12 21:54:42,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:42,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-12 21:54:42,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 21:54:42,471 INFO L628 ElimStorePlain]: treesize reduction 43, result has 64.2 percent of original size [2021-06-12 21:54:42,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 21:54:42,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-12 21:54:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547149343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:42,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:42,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-12 21:54:42,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229789565] [2021-06-12 21:54:42,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 21:54:42,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 21:54:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:54:42,589 INFO L87 Difference]: Start difference. First operand 1776 states and 3818 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:45,532 INFO L93 Difference]: Finished difference Result 3956 states and 8497 transitions. [2021-06-12 21:54:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:54:45,533 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 21:54:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:45,539 INFO L225 Difference]: With dead ends: 3956 [2021-06-12 21:54:45,539 INFO L226 Difference]: Without dead ends: 3795 [2021-06-12 21:54:45,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2457.3ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 21:54:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-12 21:54:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 1886. [2021-06-12 21:54:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 2.1527851458885943) internal successors, (4058), 1885 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 4058 transitions. [2021-06-12 21:54:45,588 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 4058 transitions. Word has length 41 [2021-06-12 21:54:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:45,588 INFO L482 AbstractCegarLoop]: Abstraction has 1886 states and 4058 transitions. [2021-06-12 21:54:45,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 4058 transitions. [2021-06-12 21:54:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 21:54:45,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:45,592 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:45,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 21:54:45,815 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-12 21:54:45,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:45,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768857222] [2021-06-12 21:54:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:45,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:45,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768857222] [2021-06-12 21:54:45,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768857222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:45,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450596625] [2021-06-12 21:54:45,880 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:45,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:54:45,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:45,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 21:54:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:45,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450596625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:45,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:45,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-12 21:54:45,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501366004] [2021-06-12 21:54:45,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 21:54:45,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:45,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 21:54:45,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 21:54:45,986 INFO L87 Difference]: Start difference. First operand 1886 states and 4058 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:46,063 INFO L93 Difference]: Finished difference Result 2387 states and 5133 transitions. [2021-06-12 21:54:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 21:54:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 21:54:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:46,069 INFO L225 Difference]: With dead ends: 2387 [2021-06-12 21:54:46,069 INFO L226 Difference]: Without dead ends: 2337 [2021-06-12 21:54:46,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:54:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-12 21:54:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2028. [2021-06-12 21:54:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.163295510606808) internal successors, (4385), 2027 states have internal predecessors, (4385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 4385 transitions. [2021-06-12 21:54:46,100 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 4385 transitions. Word has length 45 [2021-06-12 21:54:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:46,100 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 4385 transitions. [2021-06-12 21:54:46,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 4385 transitions. [2021-06-12 21:54:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 21:54:46,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:46,104 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:46,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-12 21:54:46,317 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:46,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:46,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-12 21:54:46,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:46,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354637641] [2021-06-12 21:54:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 21:54:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354637641] [2021-06-12 21:54:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354637641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121535317] [2021-06-12 21:54:46,349 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 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 [2021-06-12 21:54:46,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:54:46,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:54:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-12 21:54:46,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121535317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:46,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:46,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 21:54:46,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294516577] [2021-06-12 21:54:46,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:54:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:54:46,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:54:46,434 INFO L87 Difference]: Start difference. First operand 2028 states and 4385 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:46,454 INFO L93 Difference]: Finished difference Result 2477 states and 5328 transitions. [2021-06-12 21:54:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:54:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-12 21:54:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:46,457 INFO L225 Difference]: With dead ends: 2477 [2021-06-12 21:54:46,458 INFO L226 Difference]: Without dead ends: 2477 [2021-06-12 21:54:46,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:54:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2021-06-12 21:54:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 1590. [2021-06-12 21:54:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.1648835745752044) internal successors, (3440), 1589 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 3440 transitions. [2021-06-12 21:54:46,486 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 3440 transitions. Word has length 46 [2021-06-12 21:54:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:46,486 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 3440 transitions. [2021-06-12 21:54:46,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 3440 transitions. [2021-06-12 21:54:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 21:54:46,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:46,489 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:46,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-12 21:54:46,713 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:46,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-12 21:54:46,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:46,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520572831] [2021-06-12 21:54:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 21:54:46,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:46,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520572831] [2021-06-12 21:54:46,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520572831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:46,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532918307] [2021-06-12 21:54:46,749 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:46,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:54:46,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:46,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:54:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 21:54:46,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532918307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:46,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:46,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 21:54:46,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638088912] [2021-06-12 21:54:46,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 21:54:46,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:46,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 21:54:46,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:54:46,867 INFO L87 Difference]: Start difference. First operand 1590 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:46,890 INFO L93 Difference]: Finished difference Result 1749 states and 3746 transitions. [2021-06-12 21:54:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:54:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-12 21:54:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:46,893 INFO L225 Difference]: With dead ends: 1749 [2021-06-12 21:54:46,893 INFO L226 Difference]: Without dead ends: 1749 [2021-06-12 21:54:46,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 21:54:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2021-06-12 21:54:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1386. [2021-06-12 21:54:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 2.1494584837545125) internal successors, (2977), 1385 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2977 transitions. [2021-06-12 21:54:46,938 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2977 transitions. Word has length 46 [2021-06-12 21:54:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:46,938 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 2977 transitions. [2021-06-12 21:54:46,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2977 transitions. [2021-06-12 21:54:46,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 21:54:46,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:46,941 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:47,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-12 21:54:47,164 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-12 21:54:47,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:47,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636303589] [2021-06-12 21:54:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:47,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:47,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636303589] [2021-06-12 21:54:47,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636303589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:47,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987243688] [2021-06-12 21:54:47,743 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 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 [2021-06-12 21:54:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:47,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:54:47,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:48,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:48,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-12 21:54:48,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,415 INFO L628 ElimStorePlain]: treesize reduction 69, result has 66.8 percent of original size [2021-06-12 21:54:48,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:48,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:72 [2021-06-12 21:54:48,919 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 21:54:48,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-12 21:54:48,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:48,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:48,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-12 21:54:48,931 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:48,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987243688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:48,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:48,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-12 21:54:48,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64052626] [2021-06-12 21:54:48,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-12 21:54:48,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:48,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-12 21:54:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:54:48,933 INFO L87 Difference]: Start difference. First operand 1386 states and 2977 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:54:52,558 INFO L93 Difference]: Finished difference Result 2993 states and 6367 transitions. [2021-06-12 21:54:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 21:54:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 21:54:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:54:52,562 INFO L225 Difference]: With dead ends: 2993 [2021-06-12 21:54:52,562 INFO L226 Difference]: Without dead ends: 2897 [2021-06-12 21:54:52,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2636.4ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 21:54:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-12 21:54:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 1478. [2021-06-12 21:54:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.159106296547055) internal successors, (3189), 1477 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 3189 transitions. [2021-06-12 21:54:52,588 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 3189 transitions. Word has length 50 [2021-06-12 21:54:52,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:54:52,588 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 3189 transitions. [2021-06-12 21:54:52,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:54:52,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 3189 transitions. [2021-06-12 21:54:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 21:54:52,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:54:52,591 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:54:52,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:54:52,805 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:54:52,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:54:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-12 21:54:52,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:54:52,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142005562] [2021-06-12 21:54:52,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:54:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:54:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:54:53,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:54:53,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142005562] [2021-06-12 21:54:53,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142005562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:53,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000921226] [2021-06-12 21:54:53,291 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 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 [2021-06-12 21:54:53,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:54:53,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:54:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:54:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:54:54,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:54,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-12 21:54:54,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:54,535 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-12 21:54:54,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 21:54:54,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-12 21:54:54,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:54,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:54,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:55,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:55,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2021-06-12 21:54:55,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:54:55,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:54:55,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2021-06-12 21:54:55,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:54:55,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:54:55,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:54:55,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-12 21:54:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:54:55,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000921226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:54:55,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:54:55,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-12 21:54:55,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971052074] [2021-06-12 21:54:55,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-12 21:54:55,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:54:55,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-12 21:54:55,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:54:55,030 INFO L87 Difference]: Start difference. First operand 1478 states and 3189 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:00,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:55:00,304 INFO L93 Difference]: Finished difference Result 3235 states and 6875 transitions. [2021-06-12 21:55:00,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 21:55:00,304 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 21:55:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:55:00,307 INFO L225 Difference]: With dead ends: 3235 [2021-06-12 21:55:00,307 INFO L226 Difference]: Without dead ends: 3122 [2021-06-12 21:55:00,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4157.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 21:55:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2021-06-12 21:55:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 1551. [2021-06-12 21:55:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 2.1580645161290324) internal successors, (3345), 1550 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:00,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 3345 transitions. [2021-06-12 21:55:00,334 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 3345 transitions. Word has length 50 [2021-06-12 21:55:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:55:00,334 INFO L482 AbstractCegarLoop]: Abstraction has 1551 states and 3345 transitions. [2021-06-12 21:55:00,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:55:00,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 3345 transitions. [2021-06-12 21:55:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 21:55:00,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:55:00,338 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:55:00,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-12 21:55:00,561 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:55:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:55:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-12 21:55:00,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:55:00,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65724966] [2021-06-12 21:55:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:55:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:55:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:01,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:55:01,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65724966] [2021-06-12 21:55:01,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65724966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:01,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735503455] [2021-06-12 21:55:01,050 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 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 [2021-06-12 21:55:01,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:55:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:55:01,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-12 21:55:01,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:55:03,332 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-12 21:55:03,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:03,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-12 21:55:03,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:03,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:03,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-12 21:55:03,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:03,727 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2021-06-12 21:55:03,728 INFO L628 ElimStorePlain]: treesize reduction 149, result has 64.4 percent of original size [2021-06-12 21:55:03,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-12 21:55:03,805 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:133 [2021-06-12 21:55:15,776 WARN L205 SmtUtils]: Spent 6.37 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 21:55:39,506 WARN L205 SmtUtils]: Spent 9.21 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-12 21:55:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:39,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:39,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:39,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:39,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:55:39,871 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-12 21:55:39,872 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-12 21:55:39,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-12 21:55:40,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:55:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:40,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:40,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:55:40,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:55:40,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-12 21:55:41,087 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-12 21:55:41,198 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 270 [2021-06-12 21:55:41,337 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 277 [2021-06-12 21:55:42,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 21:55:42,383 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 72 [2021-06-12 21:55:42,383 INFO L628 ElimStorePlain]: treesize reduction 656, result has 19.0 percent of original size [2021-06-12 21:55:42,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 21:55:42,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:37 [2021-06-12 21:55:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:55:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735503455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:55:42,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:55:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-12 21:55:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393062436] [2021-06-12 21:55:42,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-12 21:55:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:55:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-12 21:55:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2267, Unknown=4, NotChecked=0, Total=2550 [2021-06-12 21:55:42,561 INFO L87 Difference]: Start difference. First operand 1551 states and 3345 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 21:56:00,150 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 40 [2021-06-12 21:56:08,935 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2021-06-12 21:56:25,745 WARN L205 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-12 21:56:39,387 WARN L205 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-12 21:56:55,114 WARN L205 SmtUtils]: Spent 6.83 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-12 21:57:02,333 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2021-06-12 21:57:20,251 WARN L205 SmtUtils]: Spent 12.61 s on a formula simplification. DAG size of input: 122 DAG size of output: 70 [2021-06-12 21:57:25,069 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 120 DAG size of output: 46 [2021-06-12 21:57:29,774 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2021-06-12 21:57:44,238 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 124 DAG size of output: 54 [2021-06-12 21:58:05,959 WARN L205 SmtUtils]: Spent 15.92 s on a formula simplification. DAG size of input: 122 DAG size of output: 72 [2021-06-12 21:58:19,387 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification. DAG size of input: 123 DAG size of output: 52 [2021-06-12 21:58:29,828 WARN L205 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 117 DAG size of output: 49 [2021-06-12 21:58:39,676 WARN L205 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2021-06-12 21:58:56,862 WARN L205 SmtUtils]: Spent 10.62 s on a formula simplification. DAG size of input: 119 DAG size of output: 46 [2021-06-12 21:59:09,786 WARN L205 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-12 21:59:17,045 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 102 DAG size of output: 68 [2021-06-12 21:59:30,798 WARN L205 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 121 DAG size of output: 48 [2021-06-12 21:59:38,882 WARN L205 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-12 21:59:51,595 WARN L205 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 123 DAG size of output: 69 [2021-06-12 22:00:06,249 WARN L205 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 97 DAG size of output: 51 [2021-06-12 22:00:20,085 WARN L205 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 137 DAG size of output: 52 [2021-06-12 22:00:29,283 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 55 [2021-06-12 22:00:52,346 WARN L205 SmtUtils]: Spent 14.02 s on a formula simplification. DAG size of input: 125 DAG size of output: 57 [2021-06-12 22:01:17,916 WARN L205 SmtUtils]: Spent 16.95 s on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2021-06-12 22:01:36,197 WARN L205 SmtUtils]: Spent 15.58 s on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2021-06-12 22:01:52,534 WARN L205 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 126 DAG size of output: 51 [2021-06-12 22:02:14,687 WARN L205 SmtUtils]: Spent 13.72 s on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-06-12 22:02:39,995 WARN L205 SmtUtils]: Spent 13.43 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2021-06-12 22:02:51,926 WARN L205 SmtUtils]: Spent 7.46 s on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2021-06-12 22:03:01,699 WARN L205 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2021-06-12 22:03:22,590 WARN L205 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 136 DAG size of output: 52 [2021-06-12 22:03:54,672 WARN L205 SmtUtils]: Spent 14.58 s on a formula simplification. DAG size of input: 113 DAG size of output: 64 [2021-06-12 22:04:06,881 WARN L205 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-06-12 22:04:21,068 WARN L205 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-12 22:04:34,236 WARN L205 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-06-12 22:05:32,734 WARN L205 SmtUtils]: Spent 16.93 s on a formula simplification. DAG size of input: 141 DAG size of output: 59 [2021-06-12 22:05:56,934 WARN L205 SmtUtils]: Spent 13.42 s on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2021-06-12 22:06:07,757 WARN L205 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-06-12 22:06:15,584 WARN L205 SmtUtils]: Spent 4.57 s on a formula simplification. DAG size of input: 85 DAG size of output: 59 [2021-06-12 22:06:34,259 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 116 DAG size of output: 64 [2021-06-12 22:07:00,009 WARN L205 SmtUtils]: Spent 13.40 s on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2021-06-12 22:07:27,954 WARN L205 SmtUtils]: Spent 12.48 s on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2021-06-12 22:08:01,184 WARN L205 SmtUtils]: Spent 4.92 s on a formula simplification. DAG size of input: 118 DAG size of output: 66 [2021-06-12 22:08:14,353 WARN L205 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 93 DAG size of output: 67 Received shutdown request... [2021-06-12 22:08:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-12 22:08:21,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:08:21,384 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 22:08:21,386 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:08:21,387 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 22:08:21,387 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:08:21 BasicIcfg [2021-06-12 22:08:21,387 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:08:21,387 INFO L168 Benchmark]: Toolchain (without parser) took 869977.30 ms. Allocated memory was 188.7 MB in the beginning and 418.4 MB in the end (delta: 229.6 MB). Free memory was 168.8 MB in the beginning and 350.3 MB in the end (delta: -181.5 MB). Peak memory consumption was 49.2 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:21,388 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 169.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:08:21,388 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.08 ms. Allocated memory is still 188.7 MB. Free memory was 168.6 MB in the beginning and 167.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:08:21,388 INFO L168 Benchmark]: Boogie Preprocessor took 19.28 ms. Allocated memory is still 188.7 MB. Free memory was 167.3 MB in the beginning and 166.4 MB in the end (delta: 984.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:21,388 INFO L168 Benchmark]: RCFGBuilder took 260.27 ms. Allocated memory is still 188.7 MB. Free memory was 166.2 MB in the beginning and 153.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:21,388 INFO L168 Benchmark]: TraceAbstraction took 869665.34 ms. Allocated memory was 188.7 MB in the beginning and 418.4 MB in the end (delta: 229.6 MB). Free memory was 152.7 MB in the beginning and 350.3 MB in the end (delta: -197.6 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. [2021-06-12 22:08:21,388 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 0.12 ms. Allocated memory is still 188.7 MB. Free memory is still 169.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.08 ms. Allocated memory is still 188.7 MB. Free memory was 168.6 MB in the beginning and 167.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.28 ms. Allocated memory is still 188.7 MB. Free memory was 167.3 MB in the beginning and 166.4 MB in the end (delta: 984.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 260.27 ms. Allocated memory is still 188.7 MB. Free memory was 166.2 MB in the beginning and 153.3 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 869665.34 ms. Allocated memory was 188.7 MB in the beginning and 418.4 MB in the end (delta: 229.6 MB). Free memory was 152.7 MB in the beginning and 350.3 MB in the end (delta: -197.6 MB). Peak memory consumption was 33.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1551states) and FLOYD_HOARE automaton (currently 114 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 152 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 869546.4ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 52.2ms, AutomataDifference: 803396.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1085 SDtfs, 5057 SDslu, 11587 SDs, 0 SdLazy, 28922 SolverSat, 3273 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 81561.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1845 GetRequests, 588 SyntacticMatches, 37 SemanticMatches, 1219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40991 ImplicationChecksByTransitivity, 758095.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2028occurred in iteration=18, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 533.3ms AutomataMinimizationTime, 22 MinimizatonAttempts, 20540 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 105.9ms SsaConstructionTime, 433.0ms SatisfiabilityAnalysisTime, 59768.5ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 268 QuantifiedInterpolants, 27388 SizeOfPredicates, 223 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 544 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 260/1315 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