/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/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:03:59,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:03:59,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:03:59,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:03:59,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:03:59,055 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:03:59,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:03:59,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:03:59,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:03:59,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:03:59,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:03:59,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:03:59,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:03:59,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:03:59,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:03:59,068 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 [2021-07-09 18:03:59,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:03:59,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:03:59,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:03:59,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:03:59,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:03:59,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:03:59,103 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:03:59,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:03:59,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:03:59,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:03:59,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:03:59,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:03:59,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:03:59,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:03:59,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:03:59,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:03:59,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:03:59,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:03:59,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:03:59,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:03:59,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:03:59,354 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:03:59,354 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:03:59,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2021-07-09 18:03:59,355 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2021-07-09 18:03:59,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:03:59,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:03:59,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:03:59,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:03:59,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:03:59,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:03:59,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:03:59,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:03:59,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:03:59,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/1) ... [2021-07-09 18:03:59,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:03:59,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:03:59,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:03:59,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:03:59,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (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 [2021-07-09 18:03:59,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:03:59,489 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:03:59,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:03:59,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:03:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:03:59,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:03:59,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:03:59,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:03:59,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:03:59,491 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:03:59,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:03:59,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:03:59,492 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-09 18:03:59,492 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-09 18:03:59,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-09 18:03:59,493 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:03:59,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:03:59,717 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:03:59,719 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:03:59 BoogieIcfgContainer [2021-07-09 18:03:59,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:03:59,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:03:59,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:03:59,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:03:59,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:03:59" (1/2) ... [2021-07-09 18:03:59,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f970475 and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:03:59, skipping insertion in model container [2021-07-09 18:03:59,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:03:59" (2/2) ... [2021-07-09 18:03:59,724 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2021-07-09 18:03:59,727 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:03:59,727 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:03:59,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:03:59,728 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:03:59,795 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-09 18:03:59,809 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-09 18:03:59,822 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:03:59,822 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:03:59,822 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:03:59,822 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:03:59,822 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:03:59,822 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:03:59,822 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:03:59,823 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:03:59,829 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-07-09 18:03:59,874 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:03:59,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:59,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:59,900 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:59,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1590059923, now seen corresponding path program 1 times [2021-07-09 18:03:59,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:59,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546747924] [2021-07-09 18:03:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546747924] [2021-07-09 18:04:00,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546747924] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:04:00,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:04:00,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:04:00,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609998287] [2021-07-09 18:04:00,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:04:00,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:00,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:04:00,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:04:00,049 INFO L87 Difference]: Start difference. First operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:00,103 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-07-09 18:04:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:04:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:04:00,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:00,116 INFO L225 Difference]: With dead ends: 912 [2021-07-09 18:04:00,117 INFO L226 Difference]: Without dead ends: 539 [2021-07-09 18:04:00,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:04:00,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-09 18:04:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-07-09 18:04:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-07-09 18:04:00,178 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-07-09 18:04:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:00,178 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-07-09 18:04:00,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-07-09 18:04:00,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:04:00,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:00,181 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:00,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:04:00,182 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2041716967, now seen corresponding path program 2 times [2021-07-09 18:04:00,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306439057] [2021-07-09 18:04:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306439057] [2021-07-09 18:04:00,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306439057] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:04:00,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:04:00,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:04:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786564305] [2021-07-09 18:04:00,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:04:00,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:04:00,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:04:00,222 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:00,273 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-07-09 18:04:00,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:04:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:04:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:00,278 INFO L225 Difference]: With dead ends: 863 [2021-07-09 18:04:00,278 INFO L226 Difference]: Without dead ends: 671 [2021-07-09 18:04:00,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:04:00,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-07-09 18:04:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-07-09 18:04:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-07-09 18:04:00,302 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-07-09 18:04:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:00,302 INFO L482 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-07-09 18:04:00,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-07-09 18:04:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:04:00,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:00,304 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:00,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:04:00,305 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1345429901, now seen corresponding path program 1 times [2021-07-09 18:04:00,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434225585] [2021-07-09 18:04:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434225585] [2021-07-09 18:04:00,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434225585] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:04:00,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:04:00,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:04:00,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301151540] [2021-07-09 18:04:00,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:04:00,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:00,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:04:00,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:04:00,336 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:00,357 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-07-09 18:04:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:04:00,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:04:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:00,362 INFO L225 Difference]: With dead ends: 752 [2021-07-09 18:04:00,362 INFO L226 Difference]: Without dead ends: 752 [2021-07-09 18:04:00,362 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:04:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-07-09 18:04:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-07-09 18:04:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-07-09 18:04:00,379 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-07-09 18:04:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:00,379 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-07-09 18:04:00,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-07-09 18:04:00,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:04:00,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:00,382 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:00,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:04:00,382 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,382 INFO L82 PathProgramCache]: Analyzing trace with hash 125377968, now seen corresponding path program 1 times [2021-07-09 18:04:00,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921603527] [2021-07-09 18:04:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:04:00,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921603527] [2021-07-09 18:04:00,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921603527] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:04:00,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:04:00,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:04:00,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883770053] [2021-07-09 18:04:00,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:04:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:04:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:04:00,410 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:00,421 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-07-09 18:04:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:04:00,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:04:00,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:00,426 INFO L225 Difference]: With dead ends: 800 [2021-07-09 18:04:00,426 INFO L226 Difference]: Without dead ends: 774 [2021-07-09 18:04:00,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:04:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-07-09 18:04:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-07-09 18:04:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-07-09 18:04:00,445 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-07-09 18:04:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:00,445 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-07-09 18:04:00,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-07-09 18:04:00,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:04:00,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:00,448 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:00,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:04:00,448 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -308585039, now seen corresponding path program 1 times [2021-07-09 18:04:00,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114852698] [2021-07-09 18:04:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114852698] [2021-07-09 18:04:00,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114852698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:00,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097018839] [2021-07-09 18:04:00,658 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 [2021-07-09 18:04:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:04:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:01,028 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 [2021-07-09 18:04:01,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:01,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:01,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:01,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-07-09 18:04:01,119 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 [2021-07-09 18:04:01,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:01,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:01,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:01,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-09 18:04:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:01,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097018839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:01,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:01,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-07-09 18:04:01,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680415171] [2021-07-09 18:04:01,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:04:01,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:01,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:04:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:01,233 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:01,687 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-07-09 18:04:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:04:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:04:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:01,693 INFO L225 Difference]: With dead ends: 1455 [2021-07-09 18:04:01,693 INFO L226 Difference]: Without dead ends: 1119 [2021-07-09 18:04:01,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-09 18:04:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-07-09 18:04:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-07-09 18:04:01,721 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-07-09 18:04:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:01,722 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-07-09 18:04:01,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-07-09 18:04:01,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:04:01,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:01,725 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:01,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:01,933 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1659336041, now seen corresponding path program 2 times [2021-07-09 18:04:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:01,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104500123] [2021-07-09 18:04:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:01,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:01,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104500123] [2021-07-09 18:04:01,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104500123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:01,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808081098] [2021-07-09 18:04:01,979 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 [2021-07-09 18:04:02,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:02,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:04:02,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:04:02,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808081098] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:04:02,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:04:02,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-07-09 18:04:02,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156945292] [2021-07-09 18:04:02,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:04:02,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:04:02,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:04:02,085 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:02,107 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-07-09 18:04:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:04:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:04:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:02,118 INFO L225 Difference]: With dead ends: 2380 [2021-07-09 18:04:02,118 INFO L226 Difference]: Without dead ends: 2330 [2021-07-09 18:04:02,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:04:02,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-07-09 18:04:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-07-09 18:04:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-07-09 18:04:02,161 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-07-09 18:04:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:02,161 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-07-09 18:04:02,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-07-09 18:04:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 18:04:02,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:02,165 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:02,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:02,377 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 480818054, now seen corresponding path program 3 times [2021-07-09 18:04:02,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:02,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503381312] [2021-07-09 18:04:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:04:02,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:02,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503381312] [2021-07-09 18:04:02,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503381312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:02,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56982151] [2021-07-09 18:04:02,423 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 [2021-07-09 18:04:02,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:04:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:04:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:04:02,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56982151] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:04:02,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:04:02,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-07-09 18:04:02,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955414238] [2021-07-09 18:04:02,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:04:02,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:04:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:04:02,523 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:02,551 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-07-09 18:04:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:04:02,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 18:04:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:02,588 INFO L225 Difference]: With dead ends: 4845 [2021-07-09 18:04:02,589 INFO L226 Difference]: Without dead ends: 4554 [2021-07-09 18:04:02,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:04:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-07-09 18:04:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-07-09 18:04:02,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-07-09 18:04:02,678 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-07-09 18:04:02,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:02,678 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-07-09 18:04:02,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-07-09 18:04:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:02,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:02,687 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:02,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:02,904 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1559474053, now seen corresponding path program 4 times [2021-07-09 18:04:02,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:02,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560273039] [2021-07-09 18:04:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:04:03,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:03,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560273039] [2021-07-09 18:04:03,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560273039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:03,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607273690] [2021-07-09 18:04:03,300 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 [2021-07-09 18:04:03,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:03,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:03,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:03,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:03,718 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 31 treesize of output 19 [2021-07-09 18:04:03,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:03,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:03,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:03,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:04:03,797 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:03,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:03,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:03,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:03,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:03,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:03,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607273690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:03,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:03,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-09 18:04:03,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282497204] [2021-07-09 18:04:03,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:04:03,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:03,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:04:03,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:04:03,879 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:11,300 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-07-09 18:04:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-07-09 18:04:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 18:04:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:11,435 INFO L225 Difference]: With dead ends: 26830 [2021-07-09 18:04:11,435 INFO L226 Difference]: Without dead ends: 23098 [2021-07-09 18:04:11,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17127 ImplicationChecksByTransitivity, 5862.0ms TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-07-09 18:04:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-07-09 18:04:11,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-07-09 18:04:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-07-09 18:04:11,701 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-07-09 18:04:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:11,702 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-07-09 18:04:11,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-07-09 18:04:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:11,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:11,771 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:11,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:11,985 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1256079791, now seen corresponding path program 5 times [2021-07-09 18:04:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:11,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735493029] [2021-07-09 18:04:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:12,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:12,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735493029] [2021-07-09 18:04:12,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735493029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:12,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055965343] [2021-07-09 18:04:12,358 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 [2021-07-09 18:04:12,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:04:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:04:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:12,715 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:12,715 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 31 treesize of output 19 [2021-07-09 18:04:12,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:12,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:12,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:12,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-09 18:04:12,909 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:12,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:12,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:12,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:12,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:12,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:12,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055965343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:12,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:12,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:12,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460070804] [2021-07-09 18:04:12,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:12,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:12,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:12,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:12,986 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:16,595 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-07-09 18:04:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-09 18:04:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:04:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:16,698 INFO L225 Difference]: With dead ends: 28401 [2021-07-09 18:04:16,698 INFO L226 Difference]: Without dead ends: 27869 [2021-07-09 18:04:16,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 2688.5ms TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-07-09 18:04:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-07-09 18:04:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-07-09 18:04:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-07-09 18:04:17,056 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-07-09 18:04:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:17,057 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-07-09 18:04:17,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-07-09 18:04:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:17,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:17,067 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:17,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:04:17,279 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:17,280 INFO L82 PathProgramCache]: Analyzing trace with hash 748755985, now seen corresponding path program 6 times [2021-07-09 18:04:17,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:17,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983742517] [2021-07-09 18:04:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:17,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983742517] [2021-07-09 18:04:17,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983742517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:17,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068175530] [2021-07-09 18:04:17,581 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 [2021-07-09 18:04:17,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:17,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:17,890 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:17,890 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 17 [2021-07-09 18:04:17,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:17,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:17,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:17,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:04:18,048 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:18,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:18,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:18,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:18,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:18,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:18,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068175530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:18,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:18,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:18,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384325978] [2021-07-09 18:04:18,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:18,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:18,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:18,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:18,142 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:22,281 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-07-09 18:04:22,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-09 18:04:22,281 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:04:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:22,466 INFO L225 Difference]: With dead ends: 37756 [2021-07-09 18:04:22,466 INFO L226 Difference]: Without dead ends: 36886 [2021-07-09 18:04:22,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 3142.1ms TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-07-09 18:04:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-07-09 18:04:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-07-09 18:04:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-07-09 18:04:22,772 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-07-09 18:04:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:22,772 INFO L482 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-07-09 18:04:22,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-07-09 18:04:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:22,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:22,788 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:23,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:23,001 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash -169323025, now seen corresponding path program 7 times [2021-07-09 18:04:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146009015] [2021-07-09 18:04:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:23,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:23,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146009015] [2021-07-09 18:04:23,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146009015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:23,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464343257] [2021-07-09 18:04:23,307 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 [2021-07-09 18:04:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:23,656 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:23,657 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 17 [2021-07-09 18:04:23,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:23,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:23,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:23,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:04:23,795 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:23,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:23,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:23,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:23,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:23,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464343257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:23,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:23,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:23,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041441152] [2021-07-09 18:04:23,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:23,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:23,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:23,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:23,884 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:04:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:28,820 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-07-09 18:04:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 18:04:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:04:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:28,951 INFO L225 Difference]: With dead ends: 47050 [2021-07-09 18:04:28,951 INFO L226 Difference]: Without dead ends: 45439 [2021-07-09 18:04:28,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 3901.0ms TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-07-09 18:04:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-07-09 18:04:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-07-09 18:04:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:29,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-07-09 18:04:29,361 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-07-09 18:04:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:29,361 INFO L482 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-07-09 18:04:29,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:04:29,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-07-09 18:04:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:29,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:29,377 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:29,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:29,597 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 137214661, now seen corresponding path program 8 times [2021-07-09 18:04:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:29,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562484194] [2021-07-09 18:04:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:29,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562484194] [2021-07-09 18:04:29,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562484194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492426074] [2021-07-09 18:04:29,905 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 [2021-07-09 18:04:29,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:29,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:29,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:30,265 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:30,265 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 31 treesize of output 19 [2021-07-09 18:04:30,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:30,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:30,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:30,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-07-09 18:04:30,381 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:30,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:30,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:30,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:30,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:30,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:30,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492426074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:30,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:30,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:30,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432141869] [2021-07-09 18:04:30,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:30,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:30,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:30,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:30,457 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:34,564 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-07-09 18:04:34,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 18:04:34,565 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:04:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:34,670 INFO L225 Difference]: With dead ends: 40863 [2021-07-09 18:04:34,670 INFO L226 Difference]: Without dead ends: 40043 [2021-07-09 18:04:34,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3021.8ms TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 18:04:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-07-09 18:04:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-07-09 18:04:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:35,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-07-09 18:04:35,033 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-07-09 18:04:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:35,034 INFO L482 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-07-09 18:04:35,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-07-09 18:04:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:35,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:35,047 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:35,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:04:35,261 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash -780864349, now seen corresponding path program 9 times [2021-07-09 18:04:35,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:35,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065511721] [2021-07-09 18:04:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:35,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:35,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065511721] [2021-07-09 18:04:35,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065511721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:35,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950356944] [2021-07-09 18:04:35,647 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 [2021-07-09 18:04:35,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:04:35,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:35,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:35,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:36,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:36,009 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 31 treesize of output 19 [2021-07-09 18:04:36,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:36,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:36,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:36,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-07-09 18:04:36,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:04:36,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:36,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:36,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:36,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:36,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-07-09 18:04:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:36,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950356944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:36,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:36,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:36,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98044990] [2021-07-09 18:04:36,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:36,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:36,290 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:41,290 INFO L93 Difference]: Finished difference Result 45280 states and 150579 transitions. [2021-07-09 18:04:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-09 18:04:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:04:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:41,417 INFO L225 Difference]: With dead ends: 45280 [2021-07-09 18:04:41,417 INFO L226 Difference]: Without dead ends: 44360 [2021-07-09 18:04:41,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 4066.9ms TimeCoverageRelationStatistics Valid=2906, Invalid=17116, Unknown=0, NotChecked=0, Total=20022 [2021-07-09 18:04:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44360 states. [2021-07-09 18:04:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44360 to 6507. [2021-07-09 18:04:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-07-09 18:04:41,802 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-07-09 18:04:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:41,803 INFO L482 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-07-09 18:04:41,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-07-09 18:04:41,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:41,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:41,815 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:42,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:42,016 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:42,016 INFO L82 PathProgramCache]: Analyzing trace with hash -114430541, now seen corresponding path program 10 times [2021-07-09 18:04:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:42,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366829292] [2021-07-09 18:04:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:42,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:42,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366829292] [2021-07-09 18:04:42,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366829292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:42,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746437896] [2021-07-09 18:04:42,322 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 [2021-07-09 18:04:42,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:42,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:42,729 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:42,730 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 31 treesize of output 19 [2021-07-09 18:04:42,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:42,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:42,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:42,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:04:42,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:42,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:42,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:42,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:42,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746437896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037968603] [2021-07-09 18:04:42,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:42,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:42,884 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:04:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:48,636 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-07-09 18:04:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-09 18:04:48,637 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:04:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:48,751 INFO L225 Difference]: With dead ends: 40459 [2021-07-09 18:04:48,751 INFO L226 Difference]: Without dead ends: 39249 [2021-07-09 18:04:48,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 4436.4ms TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-07-09 18:04:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-07-09 18:04:49,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-07-09 18:04:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-07-09 18:04:49,176 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-07-09 18:04:49,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:49,176 INFO L482 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-07-09 18:04:49,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:04:49,176 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-07-09 18:04:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:49,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:49,187 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:49,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:04:49,388 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:49,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:49,388 INFO L82 PathProgramCache]: Analyzing trace with hash -686560397, now seen corresponding path program 11 times [2021-07-09 18:04:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:49,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162571217] [2021-07-09 18:04:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:49,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162571217] [2021-07-09 18:04:49,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162571217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:49,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551073227] [2021-07-09 18:04:49,647 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 [2021-07-09 18:04:49,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:04:49,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:04:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:04:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:04:49,983 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:04:49,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:49,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:49,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:49,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-07-09 18:04:50,121 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:50,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:50,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:50,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:50,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:50,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:50,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551073227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:50,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:50,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:50,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926135499] [2021-07-09 18:04:50,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:50,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:50,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:50,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:50,199 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:53,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:53,813 INFO L93 Difference]: Finished difference Result 22347 states and 74432 transitions. [2021-07-09 18:04:53,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-09 18:04:53,813 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:04:53,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:53,864 INFO L225 Difference]: With dead ends: 22347 [2021-07-09 18:04:53,864 INFO L226 Difference]: Without dead ends: 22075 [2021-07-09 18:04:53,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 2264.0ms TimeCoverageRelationStatistics Valid=1403, Invalid=7339, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:04:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2021-07-09 18:04:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 6570. [2021-07-09 18:04:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-07-09 18:04:54,086 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-07-09 18:04:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:54,086 INFO L482 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-07-09 18:04:54,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-07-09 18:04:54,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:54,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:54,098 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:54,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:04:54,298 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 263509385, now seen corresponding path program 12 times [2021-07-09 18:04:54,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:54,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102303561] [2021-07-09 18:04:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:54,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:54,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102303561] [2021-07-09 18:04:54,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102303561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:54,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882725759] [2021-07-09 18:04:54,536 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 [2021-07-09 18:04:54,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:54,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:04:54,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:54,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:54,829 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 17 [2021-07-09 18:04:54,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:54,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:54,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:54,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:04:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:04:55,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:04:55,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:55,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:55,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:55,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:55,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-07-09 18:04:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:55,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882725759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:55,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:55,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:55,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378555626] [2021-07-09 18:04:55,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:55,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:55,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:55,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:55,113 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:57,608 INFO L93 Difference]: Finished difference Result 13093 states and 43669 transitions. [2021-07-09 18:04:57,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:04:57,608 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:04:57,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:57,637 INFO L225 Difference]: With dead ends: 13093 [2021-07-09 18:04:57,637 INFO L226 Difference]: Without dead ends: 12613 [2021-07-09 18:04:57,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 1869.0ms TimeCoverageRelationStatistics Valid=1057, Invalid=6083, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 18:04:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12613 states. [2021-07-09 18:04:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12613 to 6722. [2021-07-09 18:04:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-07-09 18:04:57,775 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-07-09 18:04:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:57,775 INFO L482 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-07-09 18:04:57,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:04:57,775 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-07-09 18:04:57,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:04:57,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:57,787 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:57,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:57,988 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:57,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:57,988 INFO L82 PathProgramCache]: Analyzing trace with hash -243814421, now seen corresponding path program 13 times [2021-07-09 18:04:57,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:57,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005985933] [2021-07-09 18:04:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:58,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:58,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005985933] [2021-07-09 18:04:58,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005985933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:58,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708392282] [2021-07-09 18:04:58,247 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 [2021-07-09 18:04:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:58,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:04:58,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:58,579 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:58,579 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 17 [2021-07-09 18:04:58,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:58,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:58,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:58,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:04:58,725 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:04:58,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:04:58,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:04:58,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:04:58,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:04:58,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:04:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:58,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708392282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:58,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:58,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:04:58,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014495504] [2021-07-09 18:04:58,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:04:58,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:58,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:04:58,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:04:58,801 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:00,546 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-07-09 18:05:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:05:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:05:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:00,619 INFO L225 Difference]: With dead ends: 12931 [2021-07-09 18:05:00,619 INFO L226 Difference]: Without dead ends: 12631 [2021-07-09 18:05:00,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1370.0ms TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:05:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-07-09 18:05:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-07-09 18:05:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-07-09 18:05:00,749 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-07-09 18:05:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:00,749 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-07-09 18:05:00,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-07-09 18:05:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:00,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:00,761 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:00,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:05:00,962 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1161893431, now seen corresponding path program 14 times [2021-07-09 18:05:00,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:00,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230027174] [2021-07-09 18:05:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:01,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230027174] [2021-07-09 18:05:01,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230027174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337487589] [2021-07-09 18:05:01,213 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 [2021-07-09 18:05:01,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:01,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:01,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:01,523 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:01,523 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 17 [2021-07-09 18:05:01,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:01,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:01,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:01,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:05:01,662 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:01,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:01,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:01,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:01,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:01,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337487589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:01,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:01,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68047776] [2021-07-09 18:05:01,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:01,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:01,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:01,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:01,750 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:06,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:06,316 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-07-09 18:05:06,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-09 18:05:06,316 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:05:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:06,402 INFO L225 Difference]: With dead ends: 31575 [2021-07-09 18:05:06,402 INFO L226 Difference]: Without dead ends: 31013 [2021-07-09 18:05:06,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 3190.8ms TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-07-09 18:05:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-07-09 18:05:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-07-09 18:05:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-07-09 18:05:06,691 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-07-09 18:05:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:06,691 INFO L482 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-07-09 18:05:06,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-07-09 18:05:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:06,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:06,703 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:06,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:06,920 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1107000947, now seen corresponding path program 15 times [2021-07-09 18:05:06,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:06,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176917562] [2021-07-09 18:05:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176917562] [2021-07-09 18:05:07,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176917562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288487140] [2021-07-09 18:05:07,187 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 [2021-07-09 18:05:07,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:05:07,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:07,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:05:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:07,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:07,654 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 31 treesize of output 19 [2021-07-09 18:05:07,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:07,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:07,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:07,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:24 [2021-07-09 18:05:07,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:07,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:07,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:07,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:07,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:07,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288487140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:07,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:07,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962447695] [2021-07-09 18:05:07,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:07,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:07,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:07,817 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:13,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:13,814 INFO L93 Difference]: Finished difference Result 35083 states and 116558 transitions. [2021-07-09 18:05:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 18:05:13,814 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:05:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:13,914 INFO L225 Difference]: With dead ends: 35083 [2021-07-09 18:05:13,915 INFO L226 Difference]: Without dead ends: 34089 [2021-07-09 18:05:13,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5891 ImplicationChecksByTransitivity, 4488.1ms TimeCoverageRelationStatistics Valid=2817, Invalid=14739, Unknown=0, NotChecked=0, Total=17556 [2021-07-09 18:05:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34089 states. [2021-07-09 18:05:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34089 to 7792. [2021-07-09 18:05:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.3162623539982032) internal successors, (25837), 7791 states have internal predecessors, (25837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:14,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 25837 transitions. [2021-07-09 18:05:14,343 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 25837 transitions. Word has length 44 [2021-07-09 18:05:14,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:14,343 INFO L482 AbstractCegarLoop]: Abstraction has 7792 states and 25837 transitions. [2021-07-09 18:05:14,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:14,344 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 25837 transitions. [2021-07-09 18:05:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:14,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:14,356 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:14,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:05:14,561 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1435545757, now seen corresponding path program 16 times [2021-07-09 18:05:14,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:14,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362130178] [2021-07-09 18:05:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:15,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:15,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362130178] [2021-07-09 18:05:15,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362130178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:15,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397757407] [2021-07-09 18:05:15,020 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 [2021-07-09 18:05:15,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:15,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:15,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:15,423 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 31 treesize of output 19 [2021-07-09 18:05:15,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:15,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:15,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:15,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:05:15,494 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:15,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:15,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:15,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:15,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:15,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:15,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397757407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:15,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:15,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:15,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600418850] [2021-07-09 18:05:15,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:15,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:15,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:15,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:15,572 INFO L87 Difference]: Start difference. First operand 7792 states and 25837 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:21,908 INFO L93 Difference]: Finished difference Result 41800 states and 139248 transitions. [2021-07-09 18:05:21,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-07-09 18:05:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:05:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:22,016 INFO L225 Difference]: With dead ends: 41800 [2021-07-09 18:05:22,016 INFO L226 Difference]: Without dead ends: 37404 [2021-07-09 18:05:22,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 4927.4ms TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-07-09 18:05:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37404 states. [2021-07-09 18:05:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37404 to 8391. [2021-07-09 18:05:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8391 states, 8390 states have (on average 3.3079856972586414) internal successors, (27754), 8390 states have internal predecessors, (27754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 27754 transitions. [2021-07-09 18:05:22,395 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 27754 transitions. Word has length 44 [2021-07-09 18:05:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:22,396 INFO L482 AbstractCegarLoop]: Abstraction has 8391 states and 27754 transitions. [2021-07-09 18:05:22,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 27754 transitions. [2021-07-09 18:05:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:22,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:22,410 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:22,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:22,625 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -789276919, now seen corresponding path program 17 times [2021-07-09 18:05:22,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:22,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937566109] [2021-07-09 18:05:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:22,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:22,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937566109] [2021-07-09 18:05:22,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937566109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:22,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393053351] [2021-07-09 18:05:22,930 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 [2021-07-09 18:05:22,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:05:22,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 18:05:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:23,262 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:23,262 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 31 treesize of output 19 [2021-07-09 18:05:23,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:23,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:23,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:23,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-09 18:05:23,394 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:23,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:23,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:23,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:23,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:23,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:23,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393053351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:23,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:23,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:23,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568135029] [2021-07-09 18:05:23,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:23,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:23,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:23,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:23,474 INFO L87 Difference]: Start difference. First operand 8391 states and 27754 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:26,963 INFO L93 Difference]: Finished difference Result 33537 states and 111619 transitions. [2021-07-09 18:05:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-07-09 18:05:26,963 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:05:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:27,048 INFO L225 Difference]: With dead ends: 33537 [2021-07-09 18:05:27,049 INFO L226 Difference]: Without dead ends: 33005 [2021-07-09 18:05:27,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 2724.3ms TimeCoverageRelationStatistics Valid=2279, Invalid=12483, Unknown=0, NotChecked=0, Total=14762 [2021-07-09 18:05:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33005 states. [2021-07-09 18:05:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33005 to 8815. [2021-07-09 18:05:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8815 states, 8814 states have (on average 3.3045155434535967) internal successors, (29126), 8814 states have internal predecessors, (29126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8815 states to 8815 states and 29126 transitions. [2021-07-09 18:05:27,408 INFO L78 Accepts]: Start accepts. Automaton has 8815 states and 29126 transitions. Word has length 44 [2021-07-09 18:05:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:27,408 INFO L482 AbstractCegarLoop]: Abstraction has 8815 states and 29126 transitions. [2021-07-09 18:05:27,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 8815 states and 29126 transitions. [2021-07-09 18:05:27,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:27,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:27,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:27,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:05:27,624 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:27,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1296600725, now seen corresponding path program 18 times [2021-07-09 18:05:27,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:27,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182114455] [2021-07-09 18:05:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:27,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:27,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182114455] [2021-07-09 18:05:27,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182114455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:27,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688356114] [2021-07-09 18:05:27,897 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 [2021-07-09 18:05:27,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:05:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:28,190 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:28,190 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 17 [2021-07-09 18:05:28,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:28,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:28,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:28,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:05:28,329 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:28,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:28,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:28,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:28,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:28,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:28,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688356114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:28,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:28,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:28,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587525481] [2021-07-09 18:05:28,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:28,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:28,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:28,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:28,398 INFO L87 Difference]: Start difference. First operand 8815 states and 29126 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:32,876 INFO L93 Difference]: Finished difference Result 42883 states and 142841 transitions. [2021-07-09 18:05:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-07-09 18:05:32,877 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:05:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:32,993 INFO L225 Difference]: With dead ends: 42883 [2021-07-09 18:05:32,993 INFO L226 Difference]: Without dead ends: 41993 [2021-07-09 18:05:32,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 3512.1ms TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-07-09 18:05:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41993 states. [2021-07-09 18:05:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41993 to 8932. [2021-07-09 18:05:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8932 states, 8931 states have (on average 3.3055648863509126) internal successors, (29522), 8931 states have internal predecessors, (29522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8932 states to 8932 states and 29522 transitions. [2021-07-09 18:05:33,391 INFO L78 Accepts]: Start accepts. Automaton has 8932 states and 29522 transitions. Word has length 44 [2021-07-09 18:05:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:33,391 INFO L482 AbstractCegarLoop]: Abstraction has 8932 states and 29522 transitions. [2021-07-09 18:05:33,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8932 states and 29522 transitions. [2021-07-09 18:05:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:33,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:33,405 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:33,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 18:05:33,609 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2080287561, now seen corresponding path program 19 times [2021-07-09 18:05:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:33,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765742577] [2021-07-09 18:05:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:33,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:33,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:33,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765742577] [2021-07-09 18:05:33,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765742577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:33,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778157623] [2021-07-09 18:05:33,973 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 [2021-07-09 18:05:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:34,304 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:34,304 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 17 [2021-07-09 18:05:34,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:34,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:34,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:34,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:05:34,448 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:34,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:34,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:34,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:34,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:34,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778157623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:34,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:34,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871001316] [2021-07-09 18:05:34,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:34,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:34,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:34,534 INFO L87 Difference]: Start difference. First operand 8932 states and 29522 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:40,332 INFO L93 Difference]: Finished difference Result 48973 states and 162757 transitions. [2021-07-09 18:05:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-07-09 18:05:40,332 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:05:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:40,463 INFO L225 Difference]: With dead ends: 48973 [2021-07-09 18:05:40,463 INFO L226 Difference]: Without dead ends: 47923 [2021-07-09 18:05:40,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 4408.0ms TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-07-09 18:05:40,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47923 states. [2021-07-09 18:05:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47923 to 9050. [2021-07-09 18:05:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 9049 states have (on average 3.305448115813902) internal successors, (29911), 9049 states have internal predecessors, (29911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 29911 transitions. [2021-07-09 18:05:40,945 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 29911 transitions. Word has length 44 [2021-07-09 18:05:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:40,945 INFO L482 AbstractCegarLoop]: Abstraction has 9050 states and 29911 transitions. [2021-07-09 18:05:40,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 29911 transitions. [2021-07-09 18:05:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:40,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:40,960 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:41,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:41,171 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1908142049, now seen corresponding path program 20 times [2021-07-09 18:05:41,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:41,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723029696] [2021-07-09 18:05:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:41,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:41,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723029696] [2021-07-09 18:05:41,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723029696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:41,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293778283] [2021-07-09 18:05:41,457 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 [2021-07-09 18:05:41,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:41,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:41,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:41,777 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 31 treesize of output 19 [2021-07-09 18:05:41,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:41,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:41,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:41,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-07-09 18:05:41,884 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:41,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:41,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:41,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:41,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293778283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:41,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:41,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:41,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063231114] [2021-07-09 18:05:41,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:41,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:41,955 INFO L87 Difference]: Start difference. First operand 9050 states and 29911 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:46,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:46,269 INFO L93 Difference]: Finished difference Result 45204 states and 150223 transitions. [2021-07-09 18:05:46,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-07-09 18:05:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:05:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:46,390 INFO L225 Difference]: With dead ends: 45204 [2021-07-09 18:05:46,390 INFO L226 Difference]: Without dead ends: 44384 [2021-07-09 18:05:46,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 3304.2ms TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-07-09 18:05:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44384 states. [2021-07-09 18:05:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44384 to 9149. [2021-07-09 18:05:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9149 states, 9148 states have (on average 3.3065150852645386) internal successors, (30248), 9148 states have internal predecessors, (30248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:46,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9149 states to 9149 states and 30248 transitions. [2021-07-09 18:05:46,918 INFO L78 Accepts]: Start accepts. Automaton has 9149 states and 30248 transitions. Word has length 44 [2021-07-09 18:05:46,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:46,918 INFO L482 AbstractCegarLoop]: Abstraction has 9149 states and 30248 transitions. [2021-07-09 18:05:46,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 9149 states and 30248 transitions. [2021-07-09 18:05:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:46,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:46,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:47,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:05:47,143 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1468746237, now seen corresponding path program 21 times [2021-07-09 18:05:47,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:47,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729841042] [2021-07-09 18:05:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:47,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:47,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:47,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729841042] [2021-07-09 18:05:47,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729841042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:47,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500774712] [2021-07-09 18:05:47,442 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 [2021-07-09 18:05:47,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:05:47,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:47,770 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:47,770 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 31 treesize of output 19 [2021-07-09 18:05:47,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:47,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:47,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:47,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:32 [2021-07-09 18:05:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:05:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:05:47,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:47,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:47,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:47,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:47,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:10 [2021-07-09 18:05:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:47,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500774712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:47,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:47,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:47,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383991374] [2021-07-09 18:05:47,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:47,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:47,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:47,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:47,982 INFO L87 Difference]: Start difference. First operand 9149 states and 30248 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:53,809 INFO L93 Difference]: Finished difference Result 49923 states and 165734 transitions. [2021-07-09 18:05:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-09 18:05:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:05:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:53,942 INFO L225 Difference]: With dead ends: 49923 [2021-07-09 18:05:53,943 INFO L226 Difference]: Without dead ends: 49003 [2021-07-09 18:05:53,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4439.8ms TimeCoverageRelationStatistics Valid=3371, Invalid=20191, Unknown=0, NotChecked=0, Total=23562 [2021-07-09 18:05:53,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49003 states. [2021-07-09 18:05:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49003 to 9032. [2021-07-09 18:05:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9032 states, 9031 states have (on average 3.3043959694386005) internal successors, (29842), 9031 states have internal predecessors, (29842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9032 states to 9032 states and 29842 transitions. [2021-07-09 18:05:54,370 INFO L78 Accepts]: Start accepts. Automaton has 9032 states and 29842 transitions. Word has length 44 [2021-07-09 18:05:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:54,370 INFO L482 AbstractCegarLoop]: Abstraction has 9032 states and 29842 transitions. [2021-07-09 18:05:54,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:05:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 9032 states and 29842 transitions. [2021-07-09 18:05:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:05:54,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:54,384 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:54,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:54,584 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:54,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:54,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2135180045, now seen corresponding path program 22 times [2021-07-09 18:05:54,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:54,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509672496] [2021-07-09 18:05:54,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:54,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:54,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509672496] [2021-07-09 18:05:54,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509672496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767505359] [2021-07-09 18:05:54,871 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:54,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:54,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:54,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:05:54,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:55,228 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:55,228 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 31 treesize of output 19 [2021-07-09 18:05:55,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:55,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:55,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:55,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:05:55,305 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:05:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:05:55,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:05:55,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:05:55,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:05:55,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:05:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:55,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767505359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:55,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:55,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:05:55,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815876690] [2021-07-09 18:05:55,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:05:55,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:55,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:05:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:05:55,377 INFO L87 Difference]: Start difference. First operand 9032 states and 29842 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:05:55,704 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-07-09 18:06:01,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:01,445 INFO L93 Difference]: Finished difference Result 45046 states and 149636 transitions. [2021-07-09 18:06:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-07-09 18:06:01,446 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:06:01,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:01,564 INFO L225 Difference]: With dead ends: 45046 [2021-07-09 18:06:01,564 INFO L226 Difference]: Without dead ends: 43836 [2021-07-09 18:06:01,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 4783.4ms TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-07-09 18:06:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43836 states. [2021-07-09 18:06:01,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43836 to 8973. [2021-07-09 18:06:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8973 states, 8972 states have (on average 3.3012706197057513) internal successors, (29619), 8972 states have internal predecessors, (29619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8973 states to 8973 states and 29619 transitions. [2021-07-09 18:06:02,026 INFO L78 Accepts]: Start accepts. Automaton has 8973 states and 29619 transitions. Word has length 44 [2021-07-09 18:06:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:02,027 INFO L482 AbstractCegarLoop]: Abstraction has 8973 states and 29619 transitions. [2021-07-09 18:06:02,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:06:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 8973 states and 29619 transitions. [2021-07-09 18:06:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:02,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:02,041 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:02,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:02,241 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1563050189, now seen corresponding path program 23 times [2021-07-09 18:06:02,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:02,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685856350] [2021-07-09 18:06:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:02,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685856350] [2021-07-09 18:06:02,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685856350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531005405] [2021-07-09 18:06:02,508 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:02,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:06:02,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:02,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:06:02,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:02,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:02,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:02,851 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:06:02,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:02,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:02,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:02,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:22 [2021-07-09 18:06:02,989 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:02,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:02,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:02,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:02,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:03,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531005405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:03,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:03,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:03,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907969741] [2021-07-09 18:06:03,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:03,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:03,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:03,061 INFO L87 Difference]: Start difference. First operand 8973 states and 29619 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:06,160 INFO L93 Difference]: Finished difference Result 23013 states and 76366 transitions. [2021-07-09 18:06:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:06:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:06:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:06,213 INFO L225 Difference]: With dead ends: 23013 [2021-07-09 18:06:06,213 INFO L226 Difference]: Without dead ends: 22741 [2021-07-09 18:06:06,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 2144.0ms TimeCoverageRelationStatistics Valid=1189, Invalid=6121, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:06:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22741 states. [2021-07-09 18:06:06,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22741 to 8595. [2021-07-09 18:06:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8595 states, 8594 states have (on average 3.3031184547358623) internal successors, (28387), 8594 states have internal predecessors, (28387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8595 states to 8595 states and 28387 transitions. [2021-07-09 18:06:06,467 INFO L78 Accepts]: Start accepts. Automaton has 8595 states and 28387 transitions. Word has length 44 [2021-07-09 18:06:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:06,467 INFO L482 AbstractCegarLoop]: Abstraction has 8595 states and 28387 transitions. [2021-07-09 18:06:06,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8595 states and 28387 transitions. [2021-07-09 18:06:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:06,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:06,481 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:06,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:06:06,681 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1134360447, now seen corresponding path program 24 times [2021-07-09 18:06:06,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:06,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367513506] [2021-07-09 18:06:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:06:06,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:06,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367513506] [2021-07-09 18:06:06,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367513506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436464911] [2021-07-09 18:06:06,999 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:07,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:07,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:07,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:07,356 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:07,356 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 31 treesize of output 19 [2021-07-09 18:06:07,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:07,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:06:07,425 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:07,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:07,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:07,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436464911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:07,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-09 18:06:07,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792942436] [2021-07-09 18:06:07,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:06:07,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:07,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:06:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:06:07,491 INFO L87 Difference]: Start difference. First operand 8595 states and 28387 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:13,638 INFO L93 Difference]: Finished difference Result 35903 states and 119478 transitions. [2021-07-09 18:06:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-07-09 18:06:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 18:06:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:13,719 INFO L225 Difference]: With dead ends: 35903 [2021-07-09 18:06:13,719 INFO L226 Difference]: Without dead ends: 31668 [2021-07-09 18:06:13,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12211 ImplicationChecksByTransitivity, 4783.9ms TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-07-09 18:06:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31668 states. [2021-07-09 18:06:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31668 to 9033. [2021-07-09 18:06:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9033 states, 9032 states have (on average 3.2980513728963685) internal successors, (29788), 9032 states have internal predecessors, (29788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:14,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9033 states to 9033 states and 29788 transitions. [2021-07-09 18:06:14,017 INFO L78 Accepts]: Start accepts. Automaton has 9033 states and 29788 transitions. Word has length 44 [2021-07-09 18:06:14,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:14,017 INFO L482 AbstractCegarLoop]: Abstraction has 9033 states and 29788 transitions. [2021-07-09 18:06:14,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 9033 states and 29788 transitions. [2021-07-09 18:06:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:14,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:14,031 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:14,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:14,232 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:14,232 INFO L82 PathProgramCache]: Analyzing trace with hash -345053005, now seen corresponding path program 25 times [2021-07-09 18:06:14,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:14,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81450895] [2021-07-09 18:06:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:14,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:14,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81450895] [2021-07-09 18:06:14,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81450895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:14,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054682478] [2021-07-09 18:06:14,552 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:14,844 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:14,844 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 31 treesize of output 19 [2021-07-09 18:06:14,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:14,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:14,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:14,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-09 18:06:14,988 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:14,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:14,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:14,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:14,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:14,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054682478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:15,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:15,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63882699] [2021-07-09 18:06:15,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:15,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:15,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:15,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:15,067 INFO L87 Difference]: Start difference. First operand 9033 states and 29788 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:06:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:19,576 INFO L93 Difference]: Finished difference Result 36007 states and 119800 transitions. [2021-07-09 18:06:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-07-09 18:06:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:06:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:19,672 INFO L225 Difference]: With dead ends: 36007 [2021-07-09 18:06:19,673 INFO L226 Difference]: Without dead ends: 35475 [2021-07-09 18:06:19,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 3060.2ms TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-07-09 18:06:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35475 states. [2021-07-09 18:06:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35475 to 9234. [2021-07-09 18:06:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9234 states, 9233 states have (on average 3.30336835264811) internal successors, (30500), 9233 states have internal predecessors, (30500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9234 states to 9234 states and 30500 transitions. [2021-07-09 18:06:20,014 INFO L78 Accepts]: Start accepts. Automaton has 9234 states and 30500 transitions. Word has length 44 [2021-07-09 18:06:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:20,014 INFO L482 AbstractCegarLoop]: Abstraction has 9234 states and 30500 transitions. [2021-07-09 18:06:20,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:06:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 9234 states and 30500 transitions. [2021-07-09 18:06:20,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:20,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:20,028 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-07-09 18:06:20,229 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash -852376811, now seen corresponding path program 26 times [2021-07-09 18:06:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:20,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382047882] [2021-07-09 18:06:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:20,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382047882] [2021-07-09 18:06:20,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382047882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069303598] [2021-07-09 18:06:20,534 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:20,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:20,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:20,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:20,846 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 31 treesize of output 19 [2021-07-09 18:06:20,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:20,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:20,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:20,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-09 18:06:20,980 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:20,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:20,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:20,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:20,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069303598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:21,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:21,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929391506] [2021-07-09 18:06:21,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:21,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:21,046 INFO L87 Difference]: Start difference. First operand 9234 states and 30500 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:21,574 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-07-09 18:06:25,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:25,120 INFO L93 Difference]: Finished difference Result 34504 states and 114768 transitions. [2021-07-09 18:06:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:06:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:06:25,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:25,206 INFO L225 Difference]: With dead ends: 34504 [2021-07-09 18:06:25,206 INFO L226 Difference]: Without dead ends: 34104 [2021-07-09 18:06:25,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3265.2ms TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-07-09 18:06:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34104 states. [2021-07-09 18:06:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34104 to 9294. [2021-07-09 18:06:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9294 states, 9293 states have (on average 3.3035618207252773) internal successors, (30700), 9293 states have internal predecessors, (30700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9294 states to 9294 states and 30700 transitions. [2021-07-09 18:06:25,521 INFO L78 Accepts]: Start accepts. Automaton has 9294 states and 30700 transitions. Word has length 44 [2021-07-09 18:06:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:25,521 INFO L482 AbstractCegarLoop]: Abstraction has 9294 states and 30700 transitions. [2021-07-09 18:06:25,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9294 states and 30700 transitions. [2021-07-09 18:06:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:25,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:25,535 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:25,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:25,736 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1770455821, now seen corresponding path program 27 times [2021-07-09 18:06:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:25,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964198022] [2021-07-09 18:06:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:26,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964198022] [2021-07-09 18:06:26,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964198022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369064201] [2021-07-09 18:06:26,029 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:26,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:06:26,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:26,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:26,318 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 31 treesize of output 19 [2021-07-09 18:06:26,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:26,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-07-09 18:06:26,446 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:26,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:26,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:26,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:26,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369064201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:26,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:26,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:26,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575389100] [2021-07-09 18:06:26,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:26,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:26,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:26,512 INFO L87 Difference]: Start difference. First operand 9294 states and 30700 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:31,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:31,742 INFO L93 Difference]: Finished difference Result 36651 states and 121809 transitions. [2021-07-09 18:06:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-07-09 18:06:31,743 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:06:31,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:31,834 INFO L225 Difference]: With dead ends: 36651 [2021-07-09 18:06:31,834 INFO L226 Difference]: Without dead ends: 36236 [2021-07-09 18:06:31,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5972 ImplicationChecksByTransitivity, 3870.0ms TimeCoverageRelationStatistics Valid=2681, Invalid=15141, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 18:06:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36236 states. [2021-07-09 18:06:32,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36236 to 9180. [2021-07-09 18:06:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-07-09 18:06:32,154 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-07-09 18:06:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:32,154 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-07-09 18:06:32,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-07-09 18:06:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:32,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:32,168 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:32,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:06:32,373 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1463918135, now seen corresponding path program 28 times [2021-07-09 18:06:32,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:32,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129769618] [2021-07-09 18:06:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:32,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129769618] [2021-07-09 18:06:32,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129769618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:32,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903497456] [2021-07-09 18:06:32,676 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:32,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:32,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:32,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:32,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:33,011 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:33,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:06:33,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:33,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:33,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:33,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:27 [2021-07-09 18:06:33,122 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:33,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:33,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:33,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:33,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:33,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:33,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903497456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:33,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:33,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:33,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400401541] [2021-07-09 18:06:33,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:33,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:33,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:33,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:33,189 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:06:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:37,186 INFO L93 Difference]: Finished difference Result 34096 states and 113371 transitions. [2021-07-09 18:06:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 18:06:37,187 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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 44 [2021-07-09 18:06:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:37,271 INFO L225 Difference]: With dead ends: 34096 [2021-07-09 18:06:37,272 INFO L226 Difference]: Without dead ends: 33696 [2021-07-09 18:06:37,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3805 ImplicationChecksByTransitivity, 2936.7ms TimeCoverageRelationStatistics Valid=1870, Invalid=10340, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 18:06:37,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33696 states. [2021-07-09 18:06:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33696 to 9279. [2021-07-09 18:06:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9278 states have (on average 3.3040525975425736) internal successors, (30655), 9278 states have internal predecessors, (30655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 30655 transitions. [2021-07-09 18:06:37,655 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 30655 transitions. Word has length 44 [2021-07-09 18:06:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:37,656 INFO L482 AbstractCegarLoop]: Abstraction has 9279 states and 30655 transitions. [2021-07-09 18:06:37,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) 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) [2021-07-09 18:06:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 30655 transitions. [2021-07-09 18:06:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:37,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:37,670 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:37,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:37,870 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1912970151, now seen corresponding path program 29 times [2021-07-09 18:06:37,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:37,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887988143] [2021-07-09 18:06:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:38,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:38,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887988143] [2021-07-09 18:06:38,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887988143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:38,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450239603] [2021-07-09 18:06:38,192 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:38,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:06:38,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:06:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,553 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 31 treesize of output 19 [2021-07-09 18:06:38,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:38,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:38,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:38,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:27 [2021-07-09 18:06:38,659 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:38,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:38,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:38,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:38,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:38,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:38,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450239603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:38,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:38,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:38,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047528463] [2021-07-09 18:06:38,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:38,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:38,736 INFO L87 Difference]: Start difference. First operand 9279 states and 30655 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:43,416 INFO L93 Difference]: Finished difference Result 35956 states and 119480 transitions. [2021-07-09 18:06:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-07-09 18:06:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:06:43,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:43,514 INFO L225 Difference]: With dead ends: 35956 [2021-07-09 18:06:43,514 INFO L226 Difference]: Without dead ends: 35541 [2021-07-09 18:06:43,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5432 ImplicationChecksByTransitivity, 3564.5ms TimeCoverageRelationStatistics Valid=2393, Invalid=13863, Unknown=0, NotChecked=0, Total=16256 [2021-07-09 18:06:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35541 states. [2021-07-09 18:06:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35541 to 9180. [2021-07-09 18:06:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9180 states, 9179 states have (on average 3.302974180193921) internal successors, (30318), 9179 states have internal predecessors, (30318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9180 states to 9180 states and 30318 transitions. [2021-07-09 18:06:43,866 INFO L78 Accepts]: Start accepts. Automaton has 9180 states and 30318 transitions. Word has length 44 [2021-07-09 18:06:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:43,866 INFO L482 AbstractCegarLoop]: Abstraction has 9180 states and 30318 transitions. [2021-07-09 18:06:43,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 9180 states and 30318 transitions. [2021-07-09 18:06:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:43,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:43,926 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:44,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-09 18:06:44,126 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1715563337, now seen corresponding path program 30 times [2021-07-09 18:06:44,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:44,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167401623] [2021-07-09 18:06:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:44,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167401623] [2021-07-09 18:06:44,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167401623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:44,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007236255] [2021-07-09 18:06:44,421 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:44,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:06:44,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:44,771 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:44,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:06:44,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:44,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:44,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:44,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:06:44,842 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:44,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:44,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:44,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:44,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:44,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:44,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007236255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:44,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:44,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-07-09 18:06:44,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711181602] [2021-07-09 18:06:44,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:06:44,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:06:44,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:06:44,928 INFO L87 Difference]: Start difference. First operand 9180 states and 30318 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:50,157 INFO L93 Difference]: Finished difference Result 32902 states and 109101 transitions. [2021-07-09 18:06:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-07-09 18:06:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-07-09 18:06:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:50,235 INFO L225 Difference]: With dead ends: 32902 [2021-07-09 18:06:50,235 INFO L226 Difference]: Without dead ends: 32417 [2021-07-09 18:06:50,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 4059.6ms TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-07-09 18:06:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32417 states. [2021-07-09 18:06:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32417 to 9018. [2021-07-09 18:06:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 3.301763335921038) internal successors, (29772), 9017 states have internal predecessors, (29772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 29772 transitions. [2021-07-09 18:06:50,672 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 29772 transitions. Word has length 44 [2021-07-09 18:06:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:50,672 INFO L482 AbstractCegarLoop]: Abstraction has 9018 states and 29772 transitions. [2021-07-09 18:06:50,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-07-09 18:06:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 29772 transitions. [2021-07-09 18:06:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:50,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:50,686 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:50,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:50,886 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 856011747, now seen corresponding path program 31 times [2021-07-09 18:06:50,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:50,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943647764] [2021-07-09 18:06:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:06:51,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:51,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943647764] [2021-07-09 18:06:51,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943647764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:51,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683579783] [2021-07-09 18:06:51,176 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:51,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:51,555 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:51,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-09 18:06:51,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:51,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:06:51,623 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:51,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:51,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:51,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683579783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:51,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:51,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-09 18:06:51,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428894773] [2021-07-09 18:06:51,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:06:51,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:06:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:06:51,690 INFO L87 Difference]: Start difference. First operand 9018 states and 29772 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:57,293 INFO L93 Difference]: Finished difference Result 32479 states and 108314 transitions. [2021-07-09 18:06:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-09 18:06:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 18:06:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:57,377 INFO L225 Difference]: With dead ends: 32479 [2021-07-09 18:06:57,377 INFO L226 Difference]: Without dead ends: 28654 [2021-07-09 18:06:57,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10023 ImplicationChecksByTransitivity, 4249.0ms TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-07-09 18:06:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28654 states. [2021-07-09 18:06:57,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28654 to 9358. [2021-07-09 18:06:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9358 states, 9357 states have (on average 3.2972106444373197) internal successors, (30852), 9357 states have internal predecessors, (30852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9358 states to 9358 states and 30852 transitions. [2021-07-09 18:06:57,712 INFO L78 Accepts]: Start accepts. Automaton has 9358 states and 30852 transitions. Word has length 44 [2021-07-09 18:06:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:57,712 INFO L482 AbstractCegarLoop]: Abstraction has 9358 states and 30852 transitions. [2021-07-09 18:06:57,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 9358 states and 30852 transitions. [2021-07-09 18:06:57,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:06:57,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:57,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:57,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:57,927 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:57,928 INFO L82 PathProgramCache]: Analyzing trace with hash 218619737, now seen corresponding path program 32 times [2021-07-09 18:06:57,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:57,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134491145] [2021-07-09 18:06:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:06:58,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134491145] [2021-07-09 18:06:58,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134491145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391791427] [2021-07-09 18:06:58,250 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:58,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:58,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:58,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:06:58,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:58,621 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:58,621 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 31 treesize of output 19 [2021-07-09 18:06:58,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:58,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-07-09 18:06:58,691 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:58,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:06:58,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:58,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:06:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391791427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:58,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-07-09 18:06:58,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441130733] [2021-07-09 18:06:58,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 18:06:58,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:58,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 18:06:58,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:06:58,762 INFO L87 Difference]: Start difference. First operand 9358 states and 30852 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:04,657 INFO L93 Difference]: Finished difference Result 35967 states and 119998 transitions. [2021-07-09 18:07:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-09 18:07:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 18:07:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:04,745 INFO L225 Difference]: With dead ends: 35967 [2021-07-09 18:07:04,745 INFO L226 Difference]: Without dead ends: 33259 [2021-07-09 18:07:04,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10209 ImplicationChecksByTransitivity, 4665.8ms TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-07-09 18:07:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33259 states. [2021-07-09 18:07:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33259 to 9428. [2021-07-09 18:07:05,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9428 states, 9427 states have (on average 3.294049008168028) internal successors, (31053), 9427 states have internal predecessors, (31053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9428 states to 9428 states and 31053 transitions. [2021-07-09 18:07:05,058 INFO L78 Accepts]: Start accepts. Automaton has 9428 states and 31053 transitions. Word has length 44 [2021-07-09 18:07:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:05,058 INFO L482 AbstractCegarLoop]: Abstraction has 9428 states and 31053 transitions. [2021-07-09 18:07:05,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9428 states and 31053 transitions. [2021-07-09 18:07:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:07:05,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:05,073 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:05,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-07-09 18:07:05,277 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1309223083, now seen corresponding path program 33 times [2021-07-09 18:07:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:05,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998155258] [2021-07-09 18:07:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:05,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:05,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998155258] [2021-07-09 18:07:05,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998155258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:05,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901336864] [2021-07-09 18:07:05,297 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:05,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:07:05,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:05,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:07:05,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:05,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901336864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:05,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:05,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:07:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556040509] [2021-07-09 18:07:05,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:07:05,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:05,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:07:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:07:05,391 INFO L87 Difference]: Start difference. First operand 9428 states and 31053 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-07-09 18:07:05,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:05,454 INFO L93 Difference]: Finished difference Result 14357 states and 47370 transitions. [2021-07-09 18:07:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:07:05,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 47 [2021-07-09 18:07:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:05,489 INFO L225 Difference]: With dead ends: 14357 [2021-07-09 18:07:05,489 INFO L226 Difference]: Without dead ends: 14153 [2021-07-09 18:07:05,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:07:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14153 states. [2021-07-09 18:07:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14153 to 10944. [2021-07-09 18:07:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10944 states, 10943 states have (on average 3.3225806451612905) internal successors, (36359), 10943 states have internal predecessors, (36359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10944 states to 10944 states and 36359 transitions. [2021-07-09 18:07:05,685 INFO L78 Accepts]: Start accepts. Automaton has 10944 states and 36359 transitions. Word has length 47 [2021-07-09 18:07:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:05,685 INFO L482 AbstractCegarLoop]: Abstraction has 10944 states and 36359 transitions. [2021-07-09 18:07:05,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-07-09 18:07:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10944 states and 36359 transitions. [2021-07-09 18:07:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:07:05,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:05,702 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:05,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:05,904 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2079845064, now seen corresponding path program 34 times [2021-07-09 18:07:05,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:05,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702652318] [2021-07-09 18:07:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:06,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:06,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702652318] [2021-07-09 18:07:06,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702652318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:06,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287505871] [2021-07-09 18:07:06,155 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:06,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:06,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:06,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:07:06,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:06,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:06,496 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 17 [2021-07-09 18:07:06,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:06,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:06,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:06,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:07:06,634 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:06,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:06,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:06,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:06,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:06,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:07:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:06,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287505871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:06,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:06,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:07:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063662157] [2021-07-09 18:07:06,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:06,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:06,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:06,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:06,703 INFO L87 Difference]: Start difference. First operand 10944 states and 36359 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:08,822 INFO L93 Difference]: Finished difference Result 26668 states and 88897 transitions. [2021-07-09 18:07:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:07:08,823 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:07:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:08,889 INFO L225 Difference]: With dead ends: 26668 [2021-07-09 18:07:08,889 INFO L226 Difference]: Without dead ends: 26368 [2021-07-09 18:07:08,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1642.7ms TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:07:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26368 states. [2021-07-09 18:07:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26368 to 11105. [2021-07-09 18:07:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11105 states, 11104 states have (on average 3.3218659942363113) internal successors, (36886), 11104 states have internal predecessors, (36886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11105 states to 11105 states and 36886 transitions. [2021-07-09 18:07:09,170 INFO L78 Accepts]: Start accepts. Automaton has 11105 states and 36886 transitions. Word has length 47 [2021-07-09 18:07:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:09,171 INFO L482 AbstractCegarLoop]: Abstraction has 11105 states and 36886 transitions. [2021-07-09 18:07:09,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 11105 states and 36886 transitions. [2021-07-09 18:07:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:07:09,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:09,188 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:09,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 18:07:09,388 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1161766054, now seen corresponding path program 35 times [2021-07-09 18:07:09,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:09,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561642436] [2021-07-09 18:07:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:09,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561642436] [2021-07-09 18:07:09,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561642436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:09,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526317323] [2021-07-09 18:07:09,633 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:09,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:07:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:09,943 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:09,944 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 17 [2021-07-09 18:07:09,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:09,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:09,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:09,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:07:10,072 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:10,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:10,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:10,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:10,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:10,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:07:10,148 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:10,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526317323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:10,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:10,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:07:10,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657439783] [2021-07-09 18:07:10,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:10,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:10,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1254, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:10,149 INFO L87 Difference]: Start difference. First operand 11105 states and 36886 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:13,047 INFO L93 Difference]: Finished difference Result 32478 states and 107950 transitions. [2021-07-09 18:07:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:07:13,048 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:07:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:13,126 INFO L225 Difference]: With dead ends: 32478 [2021-07-09 18:07:13,127 INFO L226 Difference]: Without dead ends: 32178 [2021-07-09 18:07:13,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2257.3ms TimeCoverageRelationStatistics Valid=1265, Invalid=7477, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:07:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32178 states. [2021-07-09 18:07:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32178 to 10959. [2021-07-09 18:07:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10959 states, 10958 states have (on average 3.322139076473809) internal successors, (36404), 10958 states have internal predecessors, (36404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10959 states to 10959 states and 36404 transitions. [2021-07-09 18:07:13,494 INFO L78 Accepts]: Start accepts. Automaton has 10959 states and 36404 transitions. Word has length 47 [2021-07-09 18:07:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:13,494 INFO L482 AbstractCegarLoop]: Abstraction has 10959 states and 36404 transitions. [2021-07-09 18:07:13,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10959 states and 36404 transitions. [2021-07-09 18:07:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:07:13,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:13,511 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:13,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:07:13,712 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:13,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1559125806, now seen corresponding path program 36 times [2021-07-09 18:07:13,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:13,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562913607] [2021-07-09 18:07:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:13,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:13,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562913607] [2021-07-09 18:07:13,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562913607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:13,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612606537] [2021-07-09 18:07:13,979 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:14,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:07:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:07:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:14,297 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:14,298 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 17 [2021-07-09 18:07:14,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:14,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:07:14,435 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:14,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:14,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:14,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:07:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:14,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612606537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:14,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:07:14,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317700336] [2021-07-09 18:07:14,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:14,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:14,504 INFO L87 Difference]: Start difference. First operand 10959 states and 36404 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:16,643 INFO L93 Difference]: Finished difference Result 26320 states and 87742 transitions. [2021-07-09 18:07:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:07:16,644 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:07:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:16,702 INFO L225 Difference]: With dead ends: 26320 [2021-07-09 18:07:16,702 INFO L226 Difference]: Without dead ends: 26020 [2021-07-09 18:07:16,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1615.4ms TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:07:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26020 states. [2021-07-09 18:07:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26020 to 10970. [2021-07-09 18:07:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10970 states, 10969 states have (on average 3.322271857051691) internal successors, (36442), 10969 states have internal predecessors, (36442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10970 states to 10970 states and 36442 transitions. [2021-07-09 18:07:16,949 INFO L78 Accepts]: Start accepts. Automaton has 10970 states and 36442 transitions. Word has length 47 [2021-07-09 18:07:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:16,949 INFO L482 AbstractCegarLoop]: Abstraction has 10970 states and 36442 transitions. [2021-07-09 18:07:16,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10970 states and 36442 transitions. [2021-07-09 18:07:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:07:16,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:16,966 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:17,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:07:17,167 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:17,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:17,167 INFO L82 PathProgramCache]: Analyzing trace with hash 641046796, now seen corresponding path program 37 times [2021-07-09 18:07:17,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:17,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640097579] [2021-07-09 18:07:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:17,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:17,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640097579] [2021-07-09 18:07:17,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640097579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:17,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659041454] [2021-07-09 18:07:17,443 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:07:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:17,746 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:17,746 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 17 [2021-07-09 18:07:17,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:17,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:17,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:17,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-07-09 18:07:17,867 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:17,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:17,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:17,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:17,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:17,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:07:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:17,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659041454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:17,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:17,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:07:17,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121499137] [2021-07-09 18:07:17,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:17,932 INFO L87 Difference]: Start difference. First operand 10970 states and 36442 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:20,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:20,715 INFO L93 Difference]: Finished difference Result 31704 states and 105322 transitions. [2021-07-09 18:07:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:07:20,715 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:07:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:20,795 INFO L225 Difference]: With dead ends: 31704 [2021-07-09 18:07:20,795 INFO L226 Difference]: Without dead ends: 31404 [2021-07-09 18:07:20,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2134.2ms TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-07-09 18:07:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31404 states. [2021-07-09 18:07:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31404 to 10809. [2021-07-09 18:07:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 3.3230014803849) internal successors, (35915), 10808 states have internal predecessors, (35915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 35915 transitions. [2021-07-09 18:07:21,118 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 35915 transitions. Word has length 47 [2021-07-09 18:07:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:21,118 INFO L482 AbstractCegarLoop]: Abstraction has 10809 states and 35915 transitions. [2021-07-09 18:07:21,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,118 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 35915 transitions. [2021-07-09 18:07:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:07:21,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:21,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 18:07:21,336 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash -590498608, now seen corresponding path program 38 times [2021-07-09 18:07:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:21,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532882290] [2021-07-09 18:07:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:07:21,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532882290] [2021-07-09 18:07:21,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532882290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385559594] [2021-07-09 18:07:21,355 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:07:21,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:07:21,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385559594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:21,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:21,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:07:21,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106202487] [2021-07-09 18:07:21,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:07:21,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:07:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:07:21,438 INFO L87 Difference]: Start difference. First operand 10809 states and 35915 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:21,509 INFO L93 Difference]: Finished difference Result 18453 states and 61519 transitions. [2021-07-09 18:07:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:07:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:07:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:21,550 INFO L225 Difference]: With dead ends: 18453 [2021-07-09 18:07:21,551 INFO L226 Difference]: Without dead ends: 17839 [2021-07-09 18:07:21,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:07:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2021-07-09 18:07:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 12699. [2021-07-09 18:07:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12699 states, 12698 states have (on average 3.361946763269806) internal successors, (42690), 12698 states have internal predecessors, (42690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12699 states to 12699 states and 42690 transitions. [2021-07-09 18:07:21,806 INFO L78 Accepts]: Start accepts. Automaton has 12699 states and 42690 transitions. Word has length 51 [2021-07-09 18:07:21,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:21,806 INFO L482 AbstractCegarLoop]: Abstraction has 12699 states and 42690 transitions. [2021-07-09 18:07:21,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12699 states and 42690 transitions. [2021-07-09 18:07:21,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:07:21,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:21,829 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:22,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:22,029 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1803464833, now seen corresponding path program 39 times [2021-07-09 18:07:22,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:22,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234341105] [2021-07-09 18:07:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:22,264 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-07-09 18:07:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:22,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:22,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234341105] [2021-07-09 18:07:22,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234341105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:22,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481276253] [2021-07-09 18:07:22,436 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:22,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:07:22,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-09 18:07:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:22,804 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:07:22,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:07:22,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:22,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:22,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:22,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:29 [2021-07-09 18:07:22,955 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:22,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:22,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:22,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:22,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:22,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:07:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:23,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481276253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:23,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:23,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:07:23,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185036702] [2021-07-09 18:07:23,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:23,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:23,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:23,025 INFO L87 Difference]: Start difference. First operand 12699 states and 42690 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:30,515 INFO L93 Difference]: Finished difference Result 86229 states and 293816 transitions. [2021-07-09 18:07:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-07-09 18:07:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:07:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:30,781 INFO L225 Difference]: With dead ends: 86229 [2021-07-09 18:07:30,781 INFO L226 Difference]: Without dead ends: 84335 [2021-07-09 18:07:30,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18200 ImplicationChecksByTransitivity, 5651.5ms TimeCoverageRelationStatistics Valid=5140, Invalid=40442, Unknown=0, NotChecked=0, Total=45582 [2021-07-09 18:07:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84335 states. [2021-07-09 18:07:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84335 to 13212. [2021-07-09 18:07:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13211 states have (on average 3.3770342896071455) internal successors, (44614), 13211 states have internal predecessors, (44614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:31,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 44614 transitions. [2021-07-09 18:07:31,741 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 44614 transitions. Word has length 51 [2021-07-09 18:07:31,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:31,741 INFO L482 AbstractCegarLoop]: Abstraction has 13212 states and 44614 transitions. [2021-07-09 18:07:31,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:31,741 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 44614 transitions. [2021-07-09 18:07:31,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 18:07:31,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:31,763 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:31,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:31,971 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:31,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:31,971 INFO L82 PathProgramCache]: Analyzing trace with hash -746735621, now seen corresponding path program 40 times [2021-07-09 18:07:31,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:31,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669038338] [2021-07-09 18:07:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:32,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:32,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669038338] [2021-07-09 18:07:32,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669038338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:32,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205189203] [2021-07-09 18:07:32,433 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:32,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:32,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:32,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 18:07:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:32,777 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 18:07:32,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-07-09 18:07:32,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:32,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:32,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:32,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:29 [2021-07-09 18:07:32,972 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:07:32,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-07-09 18:07:32,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:32,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:32,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:32,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-07-09 18:07:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:33,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205189203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:33,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:33,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-07-09 18:07:33,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336224985] [2021-07-09 18:07:33,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 18:07:33,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:33,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 18:07:33,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:07:33,041 INFO L87 Difference]: Start difference. First operand 13212 states and 44614 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:40,036 INFO L93 Difference]: Finished difference Result 80772 states and 276597 transitions. [2021-07-09 18:07:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-07-09 18:07:40,036 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-07-09 18:07:40,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:40,278 INFO L225 Difference]: With dead ends: 80772 [2021-07-09 18:07:40,278 INFO L226 Difference]: Without dead ends: 78736 [2021-07-09 18:07:40,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 5284.2ms TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-07-09 18:07:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78736 states. [2021-07-09 18:07:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78736 to 13623. [2021-07-09 18:07:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13623 states, 13622 states have (on average 3.3828365878725593) internal successors, (46081), 13622 states have internal predecessors, (46081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13623 states to 13623 states and 46081 transitions. [2021-07-09 18:07:41,250 INFO L78 Accepts]: Start accepts. Automaton has 13623 states and 46081 transitions. Word has length 51 [2021-07-09 18:07:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:41,250 INFO L482 AbstractCegarLoop]: Abstraction has 13623 states and 46081 transitions. [2021-07-09 18:07:41,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 13623 states and 46081 transitions. [2021-07-09 18:07:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:07:41,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:41,271 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:41,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:41,472 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 643422605, now seen corresponding path program 41 times [2021-07-09 18:07:41,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:41,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700503317] [2021-07-09 18:07:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-07-09 18:07:41,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700503317] [2021-07-09 18:07:41,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700503317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434201859] [2021-07-09 18:07:41,809 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:41,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:07:41,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:07:41,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:42,505 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:07:42,506 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 51 treesize of output 31 [2021-07-09 18:07:42,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:42,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:42,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:42,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:42 [2021-07-09 18:07:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:42,683 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 38 treesize of output 18 [2021-07-09 18:07:42,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:42,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:42,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:42,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-09 18:07:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:42,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434201859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:42,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:42,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-07-09 18:07:42,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212261046] [2021-07-09 18:07:42,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 18:07:42,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 18:07:42,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:07:42,770 INFO L87 Difference]: Start difference. First operand 13623 states and 46081 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:53,936 INFO L93 Difference]: Finished difference Result 92840 states and 316083 transitions. [2021-07-09 18:07:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-07-09 18:07:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:07:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:54,217 INFO L225 Difference]: With dead ends: 92840 [2021-07-09 18:07:54,218 INFO L226 Difference]: Without dead ends: 88224 [2021-07-09 18:07:54,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21094 ImplicationChecksByTransitivity, 8874.6ms TimeCoverageRelationStatistics Valid=5822, Invalid=46848, Unknown=0, NotChecked=0, Total=52670 [2021-07-09 18:07:54,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88224 states. [2021-07-09 18:07:55,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88224 to 14423. [2021-07-09 18:07:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14423 states, 14422 states have (on average 3.370891693246429) internal successors, (48615), 14422 states have internal predecessors, (48615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14423 states to 14423 states and 48615 transitions. [2021-07-09 18:07:55,211 INFO L78 Accepts]: Start accepts. Automaton has 14423 states and 48615 transitions. Word has length 54 [2021-07-09 18:07:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:55,211 INFO L482 AbstractCegarLoop]: Abstraction has 14423 states and 48615 transitions. [2021-07-09 18:07:55,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14423 states and 48615 transitions. [2021-07-09 18:07:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:07:55,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:55,234 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:55,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 18:07:55,435 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:55,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1581400071, now seen corresponding path program 42 times [2021-07-09 18:07:55,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:55,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616083350] [2021-07-09 18:07:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:07:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616083350] [2021-07-09 18:07:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616083350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029354670] [2021-07-09 18:07:55,732 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:55,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:07:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:07:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:56,472 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:07:56,472 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 51 treesize of output 31 [2021-07-09 18:07:56,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:56,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:56,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:56,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:07:56,632 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:07:56,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:07:56,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:56,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:56,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:56,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:07:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:56,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029354670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:56,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:56,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:07:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971725464] [2021-07-09 18:07:56,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:07:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:07:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:07:56,710 INFO L87 Difference]: Start difference. First operand 14423 states and 48615 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:06,716 INFO L93 Difference]: Finished difference Result 91747 states and 309740 transitions. [2021-07-09 18:08:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-07-09 18:08:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:08:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:06,996 INFO L225 Difference]: With dead ends: 91747 [2021-07-09 18:08:06,996 INFO L226 Difference]: Without dead ends: 90897 [2021-07-09 18:08:06,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19894 ImplicationChecksByTransitivity, 7687.5ms TimeCoverageRelationStatistics Valid=5038, Invalid=45812, Unknown=0, NotChecked=0, Total=50850 [2021-07-09 18:08:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90897 states. [2021-07-09 18:08:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90897 to 15287. [2021-07-09 18:08:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15287 states, 15286 states have (on average 3.3639931963888525) internal successors, (51422), 15286 states have internal predecessors, (51422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15287 states to 15287 states and 51422 transitions. [2021-07-09 18:08:07,850 INFO L78 Accepts]: Start accepts. Automaton has 15287 states and 51422 transitions. Word has length 54 [2021-07-09 18:08:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:07,850 INFO L482 AbstractCegarLoop]: Abstraction has 15287 states and 51422 transitions. [2021-07-09 18:08:07,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15287 states and 51422 transitions. [2021-07-09 18:08:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:08:08,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:08,078 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:08,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:08,293 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2088723877, now seen corresponding path program 43 times [2021-07-09 18:08:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:08,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031376537] [2021-07-09 18:08:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:08,483 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-07-09 18:08:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:08:08,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031376537] [2021-07-09 18:08:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031376537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:08,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348987225] [2021-07-09 18:08:08,711 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:08:08,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:09,361 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:09,361 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 49 treesize of output 29 [2021-07-09 18:08:09,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:09,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:09,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:09,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-09 18:08:09,538 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:09,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:08:09,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:09,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:09,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:09,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:08:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348987225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:09,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:09,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:08:09,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406742116] [2021-07-09 18:08:09,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:09,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:09,620 INFO L87 Difference]: Start difference. First operand 15287 states and 51422 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:21,136 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-07-09 18:08:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:21,806 INFO L93 Difference]: Finished difference Result 101039 states and 340837 transitions. [2021-07-09 18:08:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-07-09 18:08:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:08:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:22,145 INFO L225 Difference]: With dead ends: 101039 [2021-07-09 18:08:22,146 INFO L226 Difference]: Without dead ends: 100149 [2021-07-09 18:08:22,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25131 ImplicationChecksByTransitivity, 9734.6ms TimeCoverageRelationStatistics Valid=6462, Invalid=56288, Unknown=0, NotChecked=0, Total=62750 [2021-07-09 18:08:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100149 states. [2021-07-09 18:08:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100149 to 15370. [2021-07-09 18:08:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15370 states, 15369 states have (on average 3.364695165593077) internal successors, (51712), 15369 states have internal predecessors, (51712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 51712 transitions. [2021-07-09 18:08:23,068 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 51712 transitions. Word has length 54 [2021-07-09 18:08:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:23,069 INFO L482 AbstractCegarLoop]: Abstraction has 15370 states and 51712 transitions. [2021-07-09 18:08:23,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 51712 transitions. [2021-07-09 18:08:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:08:23,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:23,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:23,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:08:23,553 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1288164409, now seen corresponding path program 44 times [2021-07-09 18:08:23,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:23,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182415736] [2021-07-09 18:08:23,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:08:23,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:23,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182415736] [2021-07-09 18:08:23,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182415736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:23,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556054188] [2021-07-09 18:08:23,995 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:24,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:24,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:08:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:24,539 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:24,539 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 49 treesize of output 29 [2021-07-09 18:08:24,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:24,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:24,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:24,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-09 18:08:24,705 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:24,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:08:24,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:24,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:24,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:24,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:08:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:24,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556054188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:24,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:24,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:08:24,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781914455] [2021-07-09 18:08:24,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:24,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:24,784 INFO L87 Difference]: Start difference. First operand 15370 states and 51712 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:37,754 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-07-09 18:08:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:39,541 INFO L93 Difference]: Finished difference Result 124978 states and 424154 transitions. [2021-07-09 18:08:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-07-09 18:08:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:08:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:39,958 INFO L225 Difference]: With dead ends: 124978 [2021-07-09 18:08:39,958 INFO L226 Difference]: Without dead ends: 121408 [2021-07-09 18:08:39,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35074 ImplicationChecksByTransitivity, 11655.7ms TimeCoverageRelationStatistics Valid=8395, Invalid=75415, Unknown=0, NotChecked=0, Total=83810 [2021-07-09 18:08:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121408 states. [2021-07-09 18:08:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121408 to 17376. [2021-07-09 18:08:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17376 states, 17375 states have (on average 3.3524028776978416) internal successors, (58248), 17375 states have internal predecessors, (58248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17376 states to 17376 states and 58248 transitions. [2021-07-09 18:08:41,524 INFO L78 Accepts]: Start accepts. Automaton has 17376 states and 58248 transitions. Word has length 54 [2021-07-09 18:08:41,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:41,524 INFO L482 AbstractCegarLoop]: Abstraction has 17376 states and 58248 transitions. [2021-07-09 18:08:41,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 17376 states and 58248 transitions. [2021-07-09 18:08:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:08:41,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:41,554 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:41,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:08:41,755 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:41,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1594702095, now seen corresponding path program 45 times [2021-07-09 18:08:41,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:41,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276930597] [2021-07-09 18:08:41,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:08:42,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:42,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276930597] [2021-07-09 18:08:42,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276930597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:42,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366569923] [2021-07-09 18:08:42,086 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:42,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:08:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:42,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:08:42,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:42,786 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-09 18:08:42,798 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:42,798 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 51 treesize of output 31 [2021-07-09 18:08:42,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:42,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:42,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:42,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:08:42,931 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:42,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:08:42,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:42,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:42,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:42,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:08:43,007 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:43,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366569923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:43,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:43,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:08:43,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33515334] [2021-07-09 18:08:43,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:43,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:43,008 INFO L87 Difference]: Start difference. First operand 17376 states and 58248 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:54,664 INFO L93 Difference]: Finished difference Result 100564 states and 339046 transitions. [2021-07-09 18:08:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-07-09 18:08:54,665 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:08:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:55,013 INFO L225 Difference]: With dead ends: 100564 [2021-07-09 18:08:55,014 INFO L226 Difference]: Without dead ends: 99734 [2021-07-09 18:08:55,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22988 ImplicationChecksByTransitivity, 9035.1ms TimeCoverageRelationStatistics Valid=5801, Invalid=52039, Unknown=0, NotChecked=0, Total=57840 [2021-07-09 18:08:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99734 states. [2021-07-09 18:08:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99734 to 17519. [2021-07-09 18:08:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 3.3529512501427106) internal successors, (58737), 17518 states have internal predecessors, (58737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 58737 transitions. [2021-07-09 18:08:56,221 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 58737 transitions. Word has length 54 [2021-07-09 18:08:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:56,221 INFO L482 AbstractCegarLoop]: Abstraction has 17519 states and 58737 transitions. [2021-07-09 18:08:56,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 58737 transitions. [2021-07-09 18:08:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:08:56,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:56,249 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:56,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:08:56,459 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:56,459 INFO L82 PathProgramCache]: Analyzing trace with hash 676623085, now seen corresponding path program 46 times [2021-07-09 18:08:56,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:56,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370589024] [2021-07-09 18:08:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:08:56,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370589024] [2021-07-09 18:08:56,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370589024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:56,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773366331] [2021-07-09 18:08:56,848 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:56,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:08:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:57,537 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:57,537 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 51 treesize of output 31 [2021-07-09 18:08:57,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:57,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:57,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:57,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:08:57,663 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:08:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:08:57,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:57,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:57,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:57,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:08:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:57,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773366331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:57,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:57,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:08:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173368259] [2021-07-09 18:08:57,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:08:57,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:08:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:08:57,739 INFO L87 Difference]: Start difference. First operand 17519 states and 58737 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:11,059 INFO L93 Difference]: Finished difference Result 106844 states and 359808 transitions. [2021-07-09 18:09:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-07-09 18:09:11,059 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:09:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:11,415 INFO L225 Difference]: With dead ends: 106844 [2021-07-09 18:09:11,416 INFO L226 Difference]: Without dead ends: 105974 [2021-07-09 18:09:11,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32263 ImplicationChecksByTransitivity, 11135.4ms TimeCoverageRelationStatistics Valid=7783, Invalid=69779, Unknown=0, NotChecked=0, Total=77562 [2021-07-09 18:09:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105974 states. [2021-07-09 18:09:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105974 to 16906. [2021-07-09 18:09:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16906 states, 16905 states have (on average 3.3510795622596863) internal successors, (56650), 16905 states have internal predecessors, (56650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16906 states to 16906 states and 56650 transitions. [2021-07-09 18:09:12,707 INFO L78 Accepts]: Start accepts. Automaton has 16906 states and 56650 transitions. Word has length 54 [2021-07-09 18:09:12,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:12,708 INFO L482 AbstractCegarLoop]: Abstraction has 16906 states and 56650 transitions. [2021-07-09 18:09:12,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 16906 states and 56650 transitions. [2021-07-09 18:09:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:09:12,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:12,735 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:12,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-07-09 18:09:12,951 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:12,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1343056893, now seen corresponding path program 47 times [2021-07-09 18:09:12,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:12,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516721112] [2021-07-09 18:09:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:09:13,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516721112] [2021-07-09 18:09:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516721112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:13,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907562916] [2021-07-09 18:09:13,255 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:13,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:09:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:13,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:09:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,130 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 51 treesize of output 31 [2021-07-09 18:09:14,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:14,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:14,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:14,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:37 [2021-07-09 18:09:14,228 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:09:14,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:09:14,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:14,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:14,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:14,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:09:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:14,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907562916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:14,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:14,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:09:14,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557970072] [2021-07-09 18:09:14,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:09:14,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:14,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:09:14,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:09:14,311 INFO L87 Difference]: Start difference. First operand 16906 states and 56650 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:25,567 INFO L93 Difference]: Finished difference Result 86669 states and 292345 transitions. [2021-07-09 18:09:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-07-09 18:09:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:09:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:25,833 INFO L225 Difference]: With dead ends: 86669 [2021-07-09 18:09:25,833 INFO L226 Difference]: Without dead ends: 85459 [2021-07-09 18:09:25,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20939 ImplicationChecksByTransitivity, 8928.5ms TimeCoverageRelationStatistics Valid=5562, Invalid=48030, Unknown=0, NotChecked=0, Total=53592 [2021-07-09 18:09:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85459 states. [2021-07-09 18:09:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85459 to 16784. [2021-07-09 18:09:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16784 states, 16783 states have (on average 3.352320800810344) internal successors, (56262), 16783 states have internal predecessors, (56262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16784 states to 16784 states and 56262 transitions. [2021-07-09 18:09:26,653 INFO L78 Accepts]: Start accepts. Automaton has 16784 states and 56262 transitions. Word has length 54 [2021-07-09 18:09:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:26,653 INFO L482 AbstractCegarLoop]: Abstraction has 16784 states and 56262 transitions. [2021-07-09 18:09:26,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:26,653 INFO L276 IsEmpty]: Start isEmpty. Operand 16784 states and 56262 transitions. [2021-07-09 18:09:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:09:26,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:26,881 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:27,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:27,097 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:27,097 INFO L82 PathProgramCache]: Analyzing trace with hash 770927037, now seen corresponding path program 48 times [2021-07-09 18:09:27,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:27,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885809362] [2021-07-09 18:09:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:27,353 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 17 [2021-07-09 18:09:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:09:27,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:27,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885809362] [2021-07-09 18:09:27,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885809362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:27,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076794877] [2021-07-09 18:09:27,582 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:27,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:09:27,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:09:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:28,153 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:09:28,153 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 51 treesize of output 31 [2021-07-09 18:09:28,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:28,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:28,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:28,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:09:28,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:28,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:28,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:28,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-07-09 18:09:28,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:28,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:28,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:28,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-09 18:09:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076794877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:09:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681374956] [2021-07-09 18:09:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:09:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:09:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:09:28,472 INFO L87 Difference]: Start difference. First operand 16784 states and 56262 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:40,481 INFO L93 Difference]: Finished difference Result 91509 states and 308567 transitions. [2021-07-09 18:09:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-07-09 18:09:40,481 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:09:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:40,762 INFO L225 Difference]: With dead ends: 91509 [2021-07-09 18:09:40,762 INFO L226 Difference]: Without dead ends: 90649 [2021-07-09 18:09:40,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23550 ImplicationChecksByTransitivity, 9189.5ms TimeCoverageRelationStatistics Valid=5558, Invalid=55204, Unknown=0, NotChecked=0, Total=60762 [2021-07-09 18:09:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90649 states. [2021-07-09 18:09:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90649 to 17604. [2021-07-09 18:09:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17604 states, 17603 states have (on average 3.3469295006532978) internal successors, (58916), 17603 states have internal predecessors, (58916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17604 states to 17604 states and 58916 transitions. [2021-07-09 18:09:41,661 INFO L78 Accepts]: Start accepts. Automaton has 17604 states and 58916 transitions. Word has length 54 [2021-07-09 18:09:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:41,661 INFO L482 AbstractCegarLoop]: Abstraction has 17604 states and 58916 transitions. [2021-07-09 18:09:41,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 17604 states and 58916 transitions. [2021-07-09 18:09:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:09:41,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:41,689 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:41,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-09 18:09:41,889 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash -347938093, now seen corresponding path program 49 times [2021-07-09 18:09:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:41,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691772273] [2021-07-09 18:09:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:42,351 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-07-09 18:09:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:09:42,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691772273] [2021-07-09 18:09:42,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691772273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:42,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112909781] [2021-07-09 18:09:42,456 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:09:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:43,223 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:09:43,223 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 51 treesize of output 31 [2021-07-09 18:09:43,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:43,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:43,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:43,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:09:43,357 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:09:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:09:43,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:43,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:43,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:43,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:09:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:43,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112909781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:43,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:43,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:09:43,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900231594] [2021-07-09 18:09:43,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:09:43,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:09:43,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:09:43,439 INFO L87 Difference]: Start difference. First operand 17604 states and 58916 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:53,993 INFO L93 Difference]: Finished difference Result 77944 states and 263222 transitions. [2021-07-09 18:09:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-07-09 18:09:53,994 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:09:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:54,219 INFO L225 Difference]: With dead ends: 77944 [2021-07-09 18:09:54,219 INFO L226 Difference]: Without dead ends: 77094 [2021-07-09 18:09:54,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18674 ImplicationChecksByTransitivity, 8517.0ms TimeCoverageRelationStatistics Valid=5058, Invalid=44004, Unknown=0, NotChecked=0, Total=49062 [2021-07-09 18:09:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77094 states. [2021-07-09 18:09:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77094 to 18339. [2021-07-09 18:09:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18339 states, 18338 states have (on average 3.3434943832479007) internal successors, (61313), 18338 states have internal predecessors, (61313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18339 states to 18339 states and 61313 transitions. [2021-07-09 18:09:55,095 INFO L78 Accepts]: Start accepts. Automaton has 18339 states and 61313 transitions. Word has length 54 [2021-07-09 18:09:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:55,095 INFO L482 AbstractCegarLoop]: Abstraction has 18339 states and 61313 transitions. [2021-07-09 18:09:55,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 18339 states and 61313 transitions. [2021-07-09 18:09:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:09:55,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:55,124 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:55,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:55,324 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:55,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1720996819, now seen corresponding path program 50 times [2021-07-09 18:09:55,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:55,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024757862] [2021-07-09 18:09:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:09:55,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:55,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024757862] [2021-07-09 18:09:55,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024757862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:55,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572071557] [2021-07-09 18:09:55,677 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:55,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:55,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:09:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:56,270 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:09:56,270 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 51 treesize of output 31 [2021-07-09 18:09:56,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:56,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:56,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:56,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:09:56,447 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:09:56,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:09:56,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:56,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:56,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:56,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:09:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:56,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572071557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:56,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:56,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:09:56,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103854678] [2021-07-09 18:09:56,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:09:56,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:09:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:09:56,531 INFO L87 Difference]: Start difference. First operand 18339 states and 61313 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:08,129 INFO L93 Difference]: Finished difference Result 91695 states and 308842 transitions. [2021-07-09 18:10:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-07-09 18:10:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:10:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:08,411 INFO L225 Difference]: With dead ends: 91695 [2021-07-09 18:10:08,411 INFO L226 Difference]: Without dead ends: 90875 [2021-07-09 18:10:08,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20016 ImplicationChecksByTransitivity, 8315.7ms TimeCoverageRelationStatistics Valid=4724, Invalid=48406, Unknown=0, NotChecked=0, Total=53130 [2021-07-09 18:10:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90875 states. [2021-07-09 18:10:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90875 to 18867. [2021-07-09 18:10:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18867 states, 18866 states have (on average 3.336319304569066) internal successors, (62943), 18866 states have internal predecessors, (62943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18867 states to 18867 states and 62943 transitions. [2021-07-09 18:10:09,365 INFO L78 Accepts]: Start accepts. Automaton has 18867 states and 62943 transitions. Word has length 54 [2021-07-09 18:10:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:09,365 INFO L482 AbstractCegarLoop]: Abstraction has 18867 states and 62943 transitions. [2021-07-09 18:10:09,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18867 states and 62943 transitions. [2021-07-09 18:10:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:10:09,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:09,634 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:09,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:09,835 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1213673013, now seen corresponding path program 51 times [2021-07-09 18:10:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:09,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828838673] [2021-07-09 18:10:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:10,035 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-09 18:10:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:10:10,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:10,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828838673] [2021-07-09 18:10:10,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828838673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:10,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782015728] [2021-07-09 18:10:10,317 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:10,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:10:10,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:10,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:10,882 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:10,882 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 51 treesize of output 31 [2021-07-09 18:10:10,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:10,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:10,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:10,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:10:11,107 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:11,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:11,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:11,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:11,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:11,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:10:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:11,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782015728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:11,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:11,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:10:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306389204] [2021-07-09 18:10:11,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:10:11,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:10:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:10:11,198 INFO L87 Difference]: Start difference. First operand 18867 states and 62943 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:25,782 INFO L93 Difference]: Finished difference Result 116913 states and 393329 transitions. [2021-07-09 18:10:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-07-09 18:10:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:10:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:26,184 INFO L225 Difference]: With dead ends: 116913 [2021-07-09 18:10:26,184 INFO L226 Difference]: Without dead ends: 116083 [2021-07-09 18:10:26,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29781 ImplicationChecksByTransitivity, 11100.5ms TimeCoverageRelationStatistics Valid=6740, Invalid=69160, Unknown=0, NotChecked=0, Total=75900 [2021-07-09 18:10:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116083 states. [2021-07-09 18:10:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116083 to 20115. [2021-07-09 18:10:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20115 states, 20114 states have (on average 3.33016804215969) internal successors, (66983), 20114 states have internal predecessors, (66983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20115 states to 20115 states and 66983 transitions. [2021-07-09 18:10:27,738 INFO L78 Accepts]: Start accepts. Automaton has 20115 states and 66983 transitions. Word has length 54 [2021-07-09 18:10:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:27,738 INFO L482 AbstractCegarLoop]: Abstraction has 20115 states and 66983 transitions. [2021-07-09 18:10:27,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 20115 states and 66983 transitions. [2021-07-09 18:10:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:10:27,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:27,771 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:27,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 18:10:27,972 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 295594003, now seen corresponding path program 52 times [2021-07-09 18:10:27,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:27,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988247739] [2021-07-09 18:10:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:10:28,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988247739] [2021-07-09 18:10:28,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988247739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213343506] [2021-07-09 18:10:28,322 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:28,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:10:28,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:10:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:29,013 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:29,013 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 49 treesize of output 29 [2021-07-09 18:10:29,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:29,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:29,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:29,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-09 18:10:29,192 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:29,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:29,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:29,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:29,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:29,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:10:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:29,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213343506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:29,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:29,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:10:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187626238] [2021-07-09 18:10:29,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:10:29,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:29,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:10:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:10:29,274 INFO L87 Difference]: Start difference. First operand 20115 states and 66983 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:44,313 INFO L93 Difference]: Finished difference Result 124269 states and 417429 transitions. [2021-07-09 18:10:44,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-09 18:10:44,313 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:10:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:44,747 INFO L225 Difference]: With dead ends: 124269 [2021-07-09 18:10:44,747 INFO L226 Difference]: Without dead ends: 122609 [2021-07-09 18:10:44,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28590 ImplicationChecksByTransitivity, 11274.6ms TimeCoverageRelationStatistics Valid=6899, Invalid=66271, Unknown=0, NotChecked=0, Total=73170 [2021-07-09 18:10:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122609 states. [2021-07-09 18:10:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122609 to 21964. [2021-07-09 18:10:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21964 states, 21963 states have (on average 3.322087146564677) internal successors, (72963), 21963 states have internal predecessors, (72963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21964 states to 21964 states and 72963 transitions. [2021-07-09 18:10:46,276 INFO L78 Accepts]: Start accepts. Automaton has 21964 states and 72963 transitions. Word has length 54 [2021-07-09 18:10:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:46,276 INFO L482 AbstractCegarLoop]: Abstraction has 21964 states and 72963 transitions. [2021-07-09 18:10:46,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:46,277 INFO L276 IsEmpty]: Start isEmpty. Operand 21964 states and 72963 transitions. [2021-07-09 18:10:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:10:46,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:46,312 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:46,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 18:10:46,513 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:46,513 INFO L82 PathProgramCache]: Analyzing trace with hash 350486487, now seen corresponding path program 53 times [2021-07-09 18:10:46,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:46,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685428955] [2021-07-09 18:10:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:10:46,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:46,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685428955] [2021-07-09 18:10:46,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685428955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:46,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671368560] [2021-07-09 18:10:46,954 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:46,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:10:46,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:10:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:47,683 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:47,684 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 51 treesize of output 31 [2021-07-09 18:10:47,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:47,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:47,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:47,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-09 18:10:47,787 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:47,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:47,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:47,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:47,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:47,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:10:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:47,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671368560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:47,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:47,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:10:47,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039007501] [2021-07-09 18:10:47,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:10:47,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:47,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:10:47,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:10:47,883 INFO L87 Difference]: Start difference. First operand 21964 states and 72963 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:55,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:10:55,530 INFO L93 Difference]: Finished difference Result 69919 states and 235479 transitions. [2021-07-09 18:10:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-07-09 18:10:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:10:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:10:55,732 INFO L225 Difference]: With dead ends: 69919 [2021-07-09 18:10:55,732 INFO L226 Difference]: Without dead ends: 68859 [2021-07-09 18:10:55,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11074 ImplicationChecksByTransitivity, 5837.9ms TimeCoverageRelationStatistics Valid=3234, Invalid=27918, Unknown=0, NotChecked=0, Total=31152 [2021-07-09 18:10:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68859 states. [2021-07-09 18:10:56,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68859 to 22062. [2021-07-09 18:10:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22062 states, 22061 states have (on average 3.3209736639318255) internal successors, (73264), 22061 states have internal predecessors, (73264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 73264 transitions. [2021-07-09 18:10:56,560 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 73264 transitions. Word has length 54 [2021-07-09 18:10:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:10:56,560 INFO L482 AbstractCegarLoop]: Abstraction has 22062 states and 73264 transitions. [2021-07-09 18:10:56,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:10:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 73264 transitions. [2021-07-09 18:10:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:10:56,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:10:56,596 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:10:56,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:56,796 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:10:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:10:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1417516959, now seen corresponding path program 54 times [2021-07-09 18:10:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:10:56,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425980562] [2021-07-09 18:10:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:10:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:10:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 18:10:57,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:10:57,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425980562] [2021-07-09 18:10:57,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425980562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:57,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273376177] [2021-07-09 18:10:57,103 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:10:57,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:10:57,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:10:57,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:10:57,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:10:57,713 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:57,713 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 51 treesize of output 31 [2021-07-09 18:10:57,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:57,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:57,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:57,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:10:57,838 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:10:57,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:10:57,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:10:57,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:10:57,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:10:57,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:10:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:10:57,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273376177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:10:57,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:10:57,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:10:57,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792534957] [2021-07-09 18:10:57,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:10:57,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:10:57,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:10:57,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:10:57,913 INFO L87 Difference]: Start difference. First operand 22062 states and 73264 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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) [2021-07-09 18:11:10,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:10,781 INFO L93 Difference]: Finished difference Result 150720 states and 516372 transitions. [2021-07-09 18:11:10,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-07-09 18:11:10,782 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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 54 [2021-07-09 18:11:10,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:11,305 INFO L225 Difference]: With dead ends: 150720 [2021-07-09 18:11:11,305 INFO L226 Difference]: Without dead ends: 145955 [2021-07-09 18:11:11,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28507 ImplicationChecksByTransitivity, 10003.3ms TimeCoverageRelationStatistics Valid=7069, Invalid=62891, Unknown=0, NotChecked=0, Total=69960 [2021-07-09 18:11:11,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145955 states. [2021-07-09 18:11:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145955 to 25238. [2021-07-09 18:11:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25238 states, 25237 states have (on average 3.303245235170583) internal successors, (83364), 25237 states have internal predecessors, (83364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25238 states to 25238 states and 83364 transitions. [2021-07-09 18:11:13,373 INFO L78 Accepts]: Start accepts. Automaton has 25238 states and 83364 transitions. Word has length 54 [2021-07-09 18:11:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:13,373 INFO L482 AbstractCegarLoop]: Abstraction has 25238 states and 83364 transitions. [2021-07-09 18:11:13,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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) [2021-07-09 18:11:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 25238 states and 83364 transitions. [2021-07-09 18:11:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:11:13,557 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:13,557 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:13,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-09 18:11:13,758 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:13,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:13,758 INFO L82 PathProgramCache]: Analyzing trace with hash 668210515, now seen corresponding path program 55 times [2021-07-09 18:11:13,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:13,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662542457] [2021-07-09 18:11:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:11:14,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:14,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662542457] [2021-07-09 18:11:14,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662542457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:14,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546444418] [2021-07-09 18:11:14,075 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:11:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:14,696 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:11:14,696 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 49 treesize of output 29 [2021-07-09 18:11:14,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:14,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:14,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:14,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-09 18:11:14,851 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:11:14,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:14,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:14,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:14,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:14,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:11:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:14,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546444418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:14,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:14,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-09 18:11:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998629824] [2021-07-09 18:11:14,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:11:14,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:14,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:11:14,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:11:14,925 INFO L87 Difference]: Start difference. First operand 25238 states and 83364 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:26,266 INFO L93 Difference]: Finished difference Result 105434 states and 354160 transitions. [2021-07-09 18:11:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-09 18:11:26,266 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:11:26,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:26,648 INFO L225 Difference]: With dead ends: 105434 [2021-07-09 18:11:26,649 INFO L226 Difference]: Without dead ends: 104584 [2021-07-09 18:11:26,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23552 ImplicationChecksByTransitivity, 8621.4ms TimeCoverageRelationStatistics Valid=5754, Invalid=53538, Unknown=0, NotChecked=0, Total=59292 [2021-07-09 18:11:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104584 states. [2021-07-09 18:11:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104584 to 26860. [2021-07-09 18:11:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26860 states, 26859 states have (on average 3.29863360512305) internal successors, (88598), 26859 states have internal predecessors, (88598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26860 states to 26860 states and 88598 transitions. [2021-07-09 18:11:28,084 INFO L78 Accepts]: Start accepts. Automaton has 26860 states and 88598 transitions. Word has length 54 [2021-07-09 18:11:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:28,085 INFO L482 AbstractCegarLoop]: Abstraction has 26860 states and 88598 transitions. [2021-07-09 18:11:28,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 26860 states and 88598 transitions. [2021-07-09 18:11:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:11:28,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:28,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:28,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 18:11:28,332 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 160886709, now seen corresponding path program 56 times [2021-07-09 18:11:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:28,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580287304] [2021-07-09 18:11:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:28,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:11:28,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:28,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580287304] [2021-07-09 18:11:28,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580287304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:28,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141667223] [2021-07-09 18:11:28,680 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:28,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:11:28,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:28,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:11:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:29,391 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:11:29,392 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 51 treesize of output 31 [2021-07-09 18:11:29,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:29,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:29,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:29,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:11:29,562 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:11:29,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:29,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:29,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:29,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:29,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:11:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:29,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141667223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:29,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:29,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-09 18:11:29,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566261862] [2021-07-09 18:11:29,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:11:29,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:11:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:11:29,637 INFO L87 Difference]: Start difference. First operand 26860 states and 88598 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:43,273 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-09 18:11:43,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:11:43,595 INFO L93 Difference]: Finished difference Result 130379 states and 438439 transitions. [2021-07-09 18:11:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-07-09 18:11:43,596 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:11:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:11:44,053 INFO L225 Difference]: With dead ends: 130379 [2021-07-09 18:11:44,053 INFO L226 Difference]: Without dead ends: 129369 [2021-07-09 18:11:44,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31329 ImplicationChecksByTransitivity, 11280.7ms TimeCoverageRelationStatistics Valid=7681, Invalid=69325, Unknown=0, NotChecked=0, Total=77006 [2021-07-09 18:11:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129369 states. [2021-07-09 18:11:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129369 to 27396. [2021-07-09 18:11:45,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27396 states, 27395 states have (on average 3.301770396057675) internal successors, (90452), 27395 states have internal predecessors, (90452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27396 states to 27396 states and 90452 transitions. [2021-07-09 18:11:45,709 INFO L78 Accepts]: Start accepts. Automaton has 27396 states and 90452 transitions. Word has length 54 [2021-07-09 18:11:45,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:11:45,709 INFO L482 AbstractCegarLoop]: Abstraction has 27396 states and 90452 transitions. [2021-07-09 18:11:45,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:11:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 27396 states and 90452 transitions. [2021-07-09 18:11:45,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:11:45,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:11:45,889 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:11:46,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:46,097 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:11:46,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:11:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash -757192301, now seen corresponding path program 57 times [2021-07-09 18:11:46,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:11:46,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218514321] [2021-07-09 18:11:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:11:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:11:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:11:46,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:11:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218514321] [2021-07-09 18:11:46,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218514321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643357566] [2021-07-09 18:11:46,419 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:11:46,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:11:46,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:11:46,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:11:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:11:47,042 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:11:47,043 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 49 treesize of output 29 [2021-07-09 18:11:47,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:47,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:47,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:47,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-09 18:11:47,200 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:11:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:11:47,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:11:47,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:11:47,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:11:47,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:11:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:11:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643357566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:11:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:11:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-09 18:11:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012289011] [2021-07-09 18:11:47,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:11:47,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:11:47,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:11:47,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:11:47,275 INFO L87 Difference]: Start difference. First operand 27396 states and 90452 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:03,597 INFO L93 Difference]: Finished difference Result 144390 states and 485662 transitions. [2021-07-09 18:12:03,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-07-09 18:12:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:12:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:04,534 INFO L225 Difference]: With dead ends: 144390 [2021-07-09 18:12:04,534 INFO L226 Difference]: Without dead ends: 142820 [2021-07-09 18:12:04,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 13172.3ms TimeCoverageRelationStatistics Valid=9725, Invalid=90447, Unknown=0, NotChecked=0, Total=100172 [2021-07-09 18:12:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142820 states. [2021-07-09 18:12:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142820 to 27718. [2021-07-09 18:12:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27718 states, 27717 states have (on average 3.300285023631706) internal successors, (91474), 27717 states have internal predecessors, (91474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27718 states to 27718 states and 91474 transitions. [2021-07-09 18:12:06,173 INFO L78 Accepts]: Start accepts. Automaton has 27718 states and 91474 transitions. Word has length 54 [2021-07-09 18:12:06,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:06,173 INFO L482 AbstractCegarLoop]: Abstraction has 27718 states and 91474 transitions. [2021-07-09 18:12:06,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 27718 states and 91474 transitions. [2021-07-09 18:12:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:12:06,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:06,222 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:06,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:06,422 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:06,423 INFO L82 PathProgramCache]: Analyzing trace with hash -450654615, now seen corresponding path program 58 times [2021-07-09 18:12:06,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:06,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295744533] [2021-07-09 18:12:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:12:06,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295744533] [2021-07-09 18:12:06,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295744533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758494609] [2021-07-09 18:12:06,878 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:06,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:12:06,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:06,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:12:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:07,610 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:12:07,610 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 51 treesize of output 31 [2021-07-09 18:12:07,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:07,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:07,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:07,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:12:07,747 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:12:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:07,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:07,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:07,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:07,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:12:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:07,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758494609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:07,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:07,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-09 18:12:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789194542] [2021-07-09 18:12:07,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:12:07,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:07,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:12:07,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:12:07,822 INFO L87 Difference]: Start difference. First operand 27718 states and 91474 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:21,157 INFO L93 Difference]: Finished difference Result 126027 states and 422969 transitions. [2021-07-09 18:12:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-09 18:12:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:12:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:21,630 INFO L225 Difference]: With dead ends: 126027 [2021-07-09 18:12:21,630 INFO L226 Difference]: Without dead ends: 125012 [2021-07-09 18:12:21,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29154 ImplicationChecksByTransitivity, 10340.4ms TimeCoverageRelationStatistics Valid=7000, Invalid=65092, Unknown=0, NotChecked=0, Total=72092 [2021-07-09 18:12:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125012 states. [2021-07-09 18:12:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125012 to 27184. [2021-07-09 18:12:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27184 states, 27183 states have (on average 3.2973181768016775) internal successors, (89631), 27183 states have internal predecessors, (89631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27184 states to 27184 states and 89631 transitions. [2021-07-09 18:12:23,408 INFO L78 Accepts]: Start accepts. Automaton has 27184 states and 89631 transitions. Word has length 54 [2021-07-09 18:12:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:23,409 INFO L482 AbstractCegarLoop]: Abstraction has 27184 states and 89631 transitions. [2021-07-09 18:12:23,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27184 states and 89631 transitions. [2021-07-09 18:12:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:12:23,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:23,458 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:23,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 18:12:23,658 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1368733625, now seen corresponding path program 59 times [2021-07-09 18:12:23,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:23,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433917072] [2021-07-09 18:12:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:12:24,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:24,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433917072] [2021-07-09 18:12:24,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433917072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774813923] [2021-07-09 18:12:24,020 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:24,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:12:24,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:24,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:12:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:24,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:24,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:24,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:12:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:12:24,744 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 51 treesize of output 31 [2021-07-09 18:12:24,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:24,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:24,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:24,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:38 [2021-07-09 18:12:24,881 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:12:24,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:24,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:24,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:24,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:24,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:12:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:24,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774813923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:24,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:24,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-09 18:12:24,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789163271] [2021-07-09 18:12:24,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:12:24,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:24,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:12:24,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:12:24,958 INFO L87 Difference]: Start difference. First operand 27184 states and 89631 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:30,206 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-07-09 18:12:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:41,392 INFO L93 Difference]: Finished difference Result 132631 states and 444905 transitions. [2021-07-09 18:12:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-07-09 18:12:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:12:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:41,876 INFO L225 Difference]: With dead ends: 132631 [2021-07-09 18:12:41,876 INFO L226 Difference]: Without dead ends: 131761 [2021-07-09 18:12:41,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39131 ImplicationChecksByTransitivity, 13211.8ms TimeCoverageRelationStatistics Valid=9142, Invalid=84188, Unknown=0, NotChecked=0, Total=93330 [2021-07-09 18:12:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131761 states. [2021-07-09 18:12:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131761 to 26238. [2021-07-09 18:12:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26238 states, 26237 states have (on average 3.297976140564851) internal successors, (86529), 26237 states have internal predecessors, (86529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26238 states to 26238 states and 86529 transitions. [2021-07-09 18:12:43,718 INFO L78 Accepts]: Start accepts. Automaton has 26238 states and 86529 transitions. Word has length 54 [2021-07-09 18:12:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:12:43,718 INFO L482 AbstractCegarLoop]: Abstraction has 26238 states and 86529 transitions. [2021-07-09 18:12:43,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26238 states and 86529 transitions. [2021-07-09 18:12:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:12:43,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:12:43,770 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:12:43,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:43,987 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:12:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:12:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -702299817, now seen corresponding path program 60 times [2021-07-09 18:12:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:12:43,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215374357] [2021-07-09 18:12:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:12:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:12:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:12:44,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:12:44,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215374357] [2021-07-09 18:12:44,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215374357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:44,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503969810] [2021-07-09 18:12:44,375 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:12:44,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:12:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:12:44,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:12:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:12:45,059 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:12:45,060 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 51 treesize of output 31 [2021-07-09 18:12:45,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:45,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-09 18:12:45,154 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:12:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:12:45,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:12:45,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:12:45,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:12:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:12:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503969810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:12:45,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:12:45,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-07-09 18:12:45,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180517767] [2021-07-09 18:12:45,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-07-09 18:12:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:12:45,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-07-09 18:12:45,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:12:45,234 INFO L87 Difference]: Start difference. First operand 26238 states and 86529 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:12:58,384 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-07-09 18:12:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:12:58,530 INFO L93 Difference]: Finished difference Result 108205 states and 362412 transitions. [2021-07-09 18:12:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2021-07-09 18:12:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:12:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:12:59,035 INFO L225 Difference]: With dead ends: 108205 [2021-07-09 18:12:59,035 INFO L226 Difference]: Without dead ends: 106791 [2021-07-09 18:12:59,037 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26754 ImplicationChecksByTransitivity, 10240.3ms TimeCoverageRelationStatistics Valid=6587, Invalid=60235, Unknown=0, NotChecked=0, Total=66822 [2021-07-09 18:12:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106791 states. [2021-07-09 18:13:00,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106791 to 23572. [2021-07-09 18:13:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23572 states, 23571 states have (on average 3.3202240040728013) internal successors, (78261), 23571 states have internal predecessors, (78261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23572 states to 23572 states and 78261 transitions. [2021-07-09 18:13:00,275 INFO L78 Accepts]: Start accepts. Automaton has 23572 states and 78261 transitions. Word has length 54 [2021-07-09 18:13:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:00,275 INFO L482 AbstractCegarLoop]: Abstraction has 23572 states and 78261 transitions. [2021-07-09 18:13:00,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 23572 states and 78261 transitions. [2021-07-09 18:13:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:13:00,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:00,314 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:00,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:00,515 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:00,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1274429673, now seen corresponding path program 61 times [2021-07-09 18:13:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:00,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720150656] [2021-07-09 18:13:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:13:00,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:00,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720150656] [2021-07-09 18:13:00,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720150656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:00,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335346500] [2021-07-09 18:13:00,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:00,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:13:00,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:01,517 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:01,517 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 51 treesize of output 31 [2021-07-09 18:13:01,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:13:01,720 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:01,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:13:01,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:01,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:01,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:13:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:01,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335346500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:01,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:01,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:13:01,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627215022] [2021-07-09 18:13:01,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:13:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:13:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:13:01,797 INFO L87 Difference]: Start difference. First operand 23572 states and 78261 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:13,431 INFO L93 Difference]: Finished difference Result 101893 states and 342921 transitions. [2021-07-09 18:13:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-07-09 18:13:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:13:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:13,784 INFO L225 Difference]: With dead ends: 101893 [2021-07-09 18:13:13,784 INFO L226 Difference]: Without dead ends: 101033 [2021-07-09 18:13:13,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23364 ImplicationChecksByTransitivity, 9249.0ms TimeCoverageRelationStatistics Valid=5536, Invalid=54734, Unknown=0, NotChecked=0, Total=60270 [2021-07-09 18:13:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101033 states. [2021-07-09 18:13:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101033 to 23904. [2021-07-09 18:13:15,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23903 states have (on average 3.316487470192026) internal successors, (79274), 23903 states have internal predecessors, (79274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 79274 transitions. [2021-07-09 18:13:15,108 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 79274 transitions. Word has length 54 [2021-07-09 18:13:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:15,108 INFO L482 AbstractCegarLoop]: Abstraction has 23904 states and 79274 transitions. [2021-07-09 18:13:15,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 79274 transitions. [2021-07-09 18:13:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:13:15,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:15,147 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:15,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:15,347 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:15,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:15,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1901672493, now seen corresponding path program 62 times [2021-07-09 18:13:15,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:15,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459147189] [2021-07-09 18:13:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:15,486 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-09 18:13:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:13:15,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:15,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459147189] [2021-07-09 18:13:15,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459147189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:15,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39342373] [2021-07-09 18:13:15,853 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:15,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:13:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:13:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:16,554 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:16,555 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 51 treesize of output 31 [2021-07-09 18:13:16,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:16,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:13:16,690 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:16,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:13:16,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:16,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:16,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:13:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39342373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:16,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:16,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:13:16,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818810557] [2021-07-09 18:13:16,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:13:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:13:16,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:13:16,768 INFO L87 Difference]: Start difference. First operand 23904 states and 79274 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:28,854 INFO L93 Difference]: Finished difference Result 91780 states and 309030 transitions. [2021-07-09 18:13:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-09 18:13:28,854 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:13:28,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:29,296 INFO L225 Difference]: With dead ends: 91780 [2021-07-09 18:13:29,296 INFO L226 Difference]: Without dead ends: 90930 [2021-07-09 18:13:29,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22028 ImplicationChecksByTransitivity, 9774.4ms TimeCoverageRelationStatistics Valid=5784, Invalid=51576, Unknown=0, NotChecked=0, Total=57360 [2021-07-09 18:13:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90930 states. [2021-07-09 18:13:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90930 to 23990. [2021-07-09 18:13:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23990 states, 23989 states have (on average 3.311601150527325) internal successors, (79442), 23989 states have internal predecessors, (79442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23990 states to 23990 states and 79442 transitions. [2021-07-09 18:13:30,206 INFO L78 Accepts]: Start accepts. Automaton has 23990 states and 79442 transitions. Word has length 54 [2021-07-09 18:13:30,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:30,206 INFO L482 AbstractCegarLoop]: Abstraction has 23990 states and 79442 transitions. [2021-07-09 18:13:30,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 46 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:30,207 INFO L276 IsEmpty]: Start isEmpty. Operand 23990 states and 79442 transitions. [2021-07-09 18:13:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:13:30,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:30,245 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:30,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 18:13:30,445 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:30,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:30,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1703119415, now seen corresponding path program 63 times [2021-07-09 18:13:30,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:30,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824032415] [2021-07-09 18:13:30,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-09 18:13:31,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:31,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824032415] [2021-07-09 18:13:31,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824032415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:31,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004692393] [2021-07-09 18:13:31,051 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:31,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:13:31,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:13:31,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:31,351 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-07-09 18:13:31,802 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:31,803 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 51 treesize of output 31 [2021-07-09 18:13:31,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-09 18:13:31,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:31,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:13:31,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:13:31,923 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 38 treesize of output 18 [2021-07-09 18:13:31,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:31,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:31,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-09 18:13:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:32,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004692393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:32,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:32,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-07-09 18:13:32,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660725999] [2021-07-09 18:13:32,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:13:32,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:32,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:13:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:13:32,002 INFO L87 Difference]: Start difference. First operand 23990 states and 79442 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:45,401 INFO L93 Difference]: Finished difference Result 83749 states and 282555 transitions. [2021-07-09 18:13:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-07-09 18:13:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:13:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:13:45,647 INFO L225 Difference]: With dead ends: 83749 [2021-07-09 18:13:45,647 INFO L226 Difference]: Without dead ends: 79687 [2021-07-09 18:13:45,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22824 ImplicationChecksByTransitivity, 10884.2ms TimeCoverageRelationStatistics Valid=5842, Invalid=52480, Unknown=0, NotChecked=0, Total=58322 [2021-07-09 18:13:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79687 states. [2021-07-09 18:13:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79687 to 24522. [2021-07-09 18:13:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24522 states, 24521 states have (on average 3.308837323110803) internal successors, (81136), 24521 states have internal predecessors, (81136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24522 states to 24522 states and 81136 transitions. [2021-07-09 18:13:46,651 INFO L78 Accepts]: Start accepts. Automaton has 24522 states and 81136 transitions. Word has length 54 [2021-07-09 18:13:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:13:46,651 INFO L482 AbstractCegarLoop]: Abstraction has 24522 states and 81136 transitions. [2021-07-09 18:13:46,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 24522 states and 81136 transitions. [2021-07-09 18:13:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:13:46,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:13:46,691 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:13:46,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:46,891 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:13:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:13:46,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1112434429, now seen corresponding path program 64 times [2021-07-09 18:13:46,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:13:46,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975962700] [2021-07-09 18:13:46,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:13:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:13:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:13:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:13:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975962700] [2021-07-09 18:13:47,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975962700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396492810] [2021-07-09 18:13:47,232 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:13:47,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:13:47,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:13:47,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:13:47,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:13:47,810 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:47,810 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 51 treesize of output 31 [2021-07-09 18:13:47,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:33 [2021-07-09 18:13:47,970 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:13:47,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:13:47,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:13:47,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:13:47,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:13:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:13:48,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396492810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:13:48,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:13:48,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:13:48,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137669489] [2021-07-09 18:13:48,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:13:48,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:13:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:13:48,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:13:48,053 INFO L87 Difference]: Start difference. First operand 24522 states and 81136 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:13:48,350 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-07-09 18:13:50,547 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-09 18:13:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:13:59,693 INFO L93 Difference]: Finished difference Result 94684 states and 318256 transitions. [2021-07-09 18:13:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-07-09 18:13:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:13:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:00,025 INFO L225 Difference]: With dead ends: 94684 [2021-07-09 18:14:00,025 INFO L226 Difference]: Without dead ends: 93786 [2021-07-09 18:14:00,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22145 ImplicationChecksByTransitivity, 9012.7ms TimeCoverageRelationStatistics Valid=5306, Invalid=51576, Unknown=0, NotChecked=0, Total=56882 [2021-07-09 18:14:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93786 states. [2021-07-09 18:14:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93786 to 25118. [2021-07-09 18:14:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25118 states, 25117 states have (on average 3.3056495600589244) internal successors, (83028), 25117 states have internal predecessors, (83028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25118 states to 25118 states and 83028 transitions. [2021-07-09 18:14:01,288 INFO L78 Accepts]: Start accepts. Automaton has 25118 states and 83028 transitions. Word has length 54 [2021-07-09 18:14:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:01,288 INFO L482 AbstractCegarLoop]: Abstraction has 25118 states and 83028 transitions. [2021-07-09 18:14:01,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:01,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25118 states and 83028 transitions. [2021-07-09 18:14:01,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:14:01,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:01,330 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:01,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:01,532 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:01,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 605110623, now seen corresponding path program 65 times [2021-07-09 18:14:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:01,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401969617] [2021-07-09 18:14:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:14:01,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401969617] [2021-07-09 18:14:01,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401969617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122068729] [2021-07-09 18:14:01,872 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:01,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:14:01,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:01,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:14:01,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:02,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:02,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:02,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:02,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:02,697 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 49 treesize of output 29 [2021-07-09 18:14:02,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:02,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:02,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:02,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:31 [2021-07-09 18:14:02,864 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:02,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:02,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:02,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:02,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:02,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:14:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:02,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122068729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:02,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:02,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:14:02,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151458238] [2021-07-09 18:14:02,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:14:02,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:14:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:14:02,945 INFO L87 Difference]: Start difference. First operand 25118 states and 83028 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:17,745 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-07-09 18:14:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:18,189 INFO L93 Difference]: Finished difference Result 115635 states and 388960 transitions. [2021-07-09 18:14:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-07-09 18:14:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:14:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:18,614 INFO L225 Difference]: With dead ends: 115635 [2021-07-09 18:14:18,614 INFO L226 Difference]: Without dead ends: 114631 [2021-07-09 18:14:18,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29308 ImplicationChecksByTransitivity, 11509.2ms TimeCoverageRelationStatistics Valid=7087, Invalid=66083, Unknown=0, NotChecked=0, Total=73170 [2021-07-09 18:14:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114631 states. [2021-07-09 18:14:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114631 to 25490. [2021-07-09 18:14:20,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25490 states, 25489 states have (on average 3.3076621287614265) internal successors, (84309), 25489 states have internal predecessors, (84309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25490 states to 25490 states and 84309 transitions. [2021-07-09 18:14:20,109 INFO L78 Accepts]: Start accepts. Automaton has 25490 states and 84309 transitions. Word has length 54 [2021-07-09 18:14:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:20,110 INFO L482 AbstractCegarLoop]: Abstraction has 25490 states and 84309 transitions. [2021-07-09 18:14:20,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:20,110 INFO L276 IsEmpty]: Start isEmpty. Operand 25490 states and 84309 transitions. [2021-07-09 18:14:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:14:20,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:20,150 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:20,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-07-09 18:14:20,350 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:20,350 INFO L82 PathProgramCache]: Analyzing trace with hash -312968387, now seen corresponding path program 66 times [2021-07-09 18:14:20,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:20,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604589247] [2021-07-09 18:14:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:14:20,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:20,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604589247] [2021-07-09 18:14:20,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604589247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:20,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67808146] [2021-07-09 18:14:20,891 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:20,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:14:20,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:20,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:14:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:21,502 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:21,502 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 49 treesize of output 29 [2021-07-09 18:14:21,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:21,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:21,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:21,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:31 [2021-07-09 18:14:21,667 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:21,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:21,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:21,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:21,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:21,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:14:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:21,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67808146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:21,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:21,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:14:21,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482481199] [2021-07-09 18:14:21,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:14:21,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:21,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:14:21,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:14:21,745 INFO L87 Difference]: Start difference. First operand 25490 states and 84309 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:38,084 INFO L93 Difference]: Finished difference Result 126947 states and 426952 transitions. [2021-07-09 18:14:38,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2021-07-09 18:14:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:14:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:38,828 INFO L225 Difference]: With dead ends: 126947 [2021-07-09 18:14:38,828 INFO L226 Difference]: Without dead ends: 125608 [2021-07-09 18:14:38,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39699 ImplicationChecksByTransitivity, 13283.1ms TimeCoverageRelationStatistics Valid=8842, Invalid=86948, Unknown=0, NotChecked=0, Total=95790 [2021-07-09 18:14:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125608 states. [2021-07-09 18:14:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125608 to 25380. [2021-07-09 18:14:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25380 states, 25379 states have (on average 3.307064896174002) internal successors, (83930), 25379 states have internal predecessors, (83930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25380 states to 25380 states and 83930 transitions. [2021-07-09 18:14:40,518 INFO L78 Accepts]: Start accepts. Automaton has 25380 states and 83930 transitions. Word has length 54 [2021-07-09 18:14:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:40,518 INFO L482 AbstractCegarLoop]: Abstraction has 25380 states and 83930 transitions. [2021-07-09 18:14:40,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 25380 states and 83930 transitions. [2021-07-09 18:14:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:14:40,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:40,560 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:40,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:40,761 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash -6430701, now seen corresponding path program 67 times [2021-07-09 18:14:40,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:40,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949579911] [2021-07-09 18:14:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:14:41,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949579911] [2021-07-09 18:14:41,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949579911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:41,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041040786] [2021-07-09 18:14:41,195 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:41,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:14:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:41,858 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:41,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-07-09 18:14:41,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:41,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:41,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:41,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:14:41,987 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:41,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:41,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:41,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:41,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:14:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:42,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041040786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:42,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:42,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:14:42,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302701648] [2021-07-09 18:14:42,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:14:42,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:42,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:14:42,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1782, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:14:42,063 INFO L87 Difference]: Start difference. First operand 25380 states and 83930 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:55,767 INFO L93 Difference]: Finished difference Result 116033 states and 390273 transitions. [2021-07-09 18:14:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2021-07-09 18:14:55,767 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:14:55,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:56,207 INFO L225 Difference]: With dead ends: 116033 [2021-07-09 18:14:56,207 INFO L226 Difference]: Without dead ends: 115155 [2021-07-09 18:14:56,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27626 ImplicationChecksByTransitivity, 10481.8ms TimeCoverageRelationStatistics Valid=6490, Invalid=62942, Unknown=0, NotChecked=0, Total=69432 [2021-07-09 18:14:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115155 states. [2021-07-09 18:14:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115155 to 25374. [2021-07-09 18:14:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25374 states, 25373 states have (on average 3.307019272454972) internal successors, (83909), 25373 states have internal predecessors, (83909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25374 states to 25374 states and 83909 transitions. [2021-07-09 18:14:57,853 INFO L78 Accepts]: Start accepts. Automaton has 25374 states and 83909 transitions. Word has length 54 [2021-07-09 18:14:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:57,853 INFO L482 AbstractCegarLoop]: Abstraction has 25374 states and 83909 transitions. [2021-07-09 18:14:57,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 25374 states and 83909 transitions. [2021-07-09 18:14:58,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:14:58,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:58,027 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:58,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:58,233 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:58,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:58,233 INFO L82 PathProgramCache]: Analyzing trace with hash -924509711, now seen corresponding path program 68 times [2021-07-09 18:14:58,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:58,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787705707] [2021-07-09 18:14:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:14:58,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:58,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787705707] [2021-07-09 18:14:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787705707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:58,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67398286] [2021-07-09 18:14:58,582 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:58,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:58,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:14:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:59,264 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:59,264 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 51 treesize of output 31 [2021-07-09 18:14:59,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:59,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:59,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:59,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:14:59,397 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:14:59,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:14:59,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:59,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:59,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:59,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:14:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:59,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67398286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:59,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:59,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:14:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883990875] [2021-07-09 18:14:59,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:14:59,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:14:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:14:59,477 INFO L87 Difference]: Start difference. First operand 25374 states and 83909 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:17,059 INFO L93 Difference]: Finished difference Result 120682 states and 405497 transitions. [2021-07-09 18:15:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-07-09 18:15:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:15:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:17,530 INFO L225 Difference]: With dead ends: 120682 [2021-07-09 18:15:17,530 INFO L226 Difference]: Without dead ends: 119807 [2021-07-09 18:15:17,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37756 ImplicationChecksByTransitivity, 13751.4ms TimeCoverageRelationStatistics Valid=8417, Invalid=83089, Unknown=0, NotChecked=0, Total=91506 [2021-07-09 18:15:17,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119807 states. [2021-07-09 18:15:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119807 to 25158. [2021-07-09 18:15:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25158 states, 25157 states have (on average 3.305879079381484) internal successors, (83166), 25157 states have internal predecessors, (83166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25158 states to 25158 states and 83166 transitions. [2021-07-09 18:15:19,358 INFO L78 Accepts]: Start accepts. Automaton has 25158 states and 83166 transitions. Word has length 54 [2021-07-09 18:15:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:19,358 INFO L482 AbstractCegarLoop]: Abstraction has 25158 states and 83166 transitions. [2021-07-09 18:15:19,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 25158 states and 83166 transitions. [2021-07-09 18:15:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:15:19,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:19,404 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:19,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:19,605 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash -258075903, now seen corresponding path program 69 times [2021-07-09 18:15:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873460654] [2021-07-09 18:15:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 18:15:19,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873460654] [2021-07-09 18:15:19,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873460654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578181803] [2021-07-09 18:15:19,973 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:20,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:15:20,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:20,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:15:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:20,777 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:15:20,778 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 51 treesize of output 31 [2021-07-09 18:15:20,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:20,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:20,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:20,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-09 18:15:20,875 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:15:20,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:20,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:20,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:20,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:20,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:15:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:20,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578181803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:20,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:20,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:15:20,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455595542] [2021-07-09 18:15:20,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:15:20,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:20,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:15:20,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:15:20,955 INFO L87 Difference]: Start difference. First operand 25158 states and 83166 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:34,393 INFO L93 Difference]: Finished difference Result 95640 states and 320302 transitions. [2021-07-09 18:15:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-07-09 18:15:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:15:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:34,713 INFO L225 Difference]: With dead ends: 95640 [2021-07-09 18:15:34,713 INFO L226 Difference]: Without dead ends: 94430 [2021-07-09 18:15:34,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26277 ImplicationChecksByTransitivity, 10714.3ms TimeCoverageRelationStatistics Valid=6263, Invalid=60043, Unknown=0, NotChecked=0, Total=66306 [2021-07-09 18:15:34,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94430 states. [2021-07-09 18:15:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94430 to 25134. [2021-07-09 18:15:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25134 states, 25133 states have (on average 3.3059324394222735) internal successors, (83088), 25133 states have internal predecessors, (83088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25134 states to 25134 states and 83088 transitions. [2021-07-09 18:15:36,131 INFO L78 Accepts]: Start accepts. Automaton has 25134 states and 83088 transitions. Word has length 54 [2021-07-09 18:15:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:36,131 INFO L482 AbstractCegarLoop]: Abstraction has 25134 states and 83088 transitions. [2021-07-09 18:15:36,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25134 states and 83088 transitions. [2021-07-09 18:15:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:15:36,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:36,170 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:36,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-09 18:15:36,371 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1981468115, now seen corresponding path program 70 times [2021-07-09 18:15:36,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:36,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332434256] [2021-07-09 18:15:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-07-09 18:15:36,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332434256] [2021-07-09 18:15:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332434256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355847409] [2021-07-09 18:15:36,847 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:36,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:36,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:36,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:15:36,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:37,555 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:15:37,555 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 51 treesize of output 31 [2021-07-09 18:15:37,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:37,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:37,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:37,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-09 18:15:37,657 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:15:37,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:37,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:37,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:37,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:37,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:15:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:37,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355847409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:37,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:37,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-07-09 18:15:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317532336] [2021-07-09 18:15:37,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 18:15:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 18:15:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1779, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:15:37,779 INFO L87 Difference]: Start difference. First operand 25134 states and 83088 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:49,549 INFO L93 Difference]: Finished difference Result 86306 states and 290216 transitions. [2021-07-09 18:15:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-07-09 18:15:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:15:49,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:49,828 INFO L225 Difference]: With dead ends: 86306 [2021-07-09 18:15:49,828 INFO L226 Difference]: Without dead ends: 82314 [2021-07-09 18:15:49,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19453 ImplicationChecksByTransitivity, 9054.8ms TimeCoverageRelationStatistics Valid=5086, Invalid=44866, Unknown=0, NotChecked=0, Total=49952 [2021-07-09 18:15:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82314 states. [2021-07-09 18:15:50,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82314 to 25752. [2021-07-09 18:15:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25752 states, 25751 states have (on average 3.303522193312881) internal successors, (85069), 25751 states have internal predecessors, (85069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25752 states to 25752 states and 85069 transitions. [2021-07-09 18:15:51,149 INFO L78 Accepts]: Start accepts. Automaton has 25752 states and 85069 transitions. Word has length 54 [2021-07-09 18:15:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:51,150 INFO L482 AbstractCegarLoop]: Abstraction has 25752 states and 85069 transitions. [2021-07-09 18:15:51,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 25752 states and 85069 transitions. [2021-07-09 18:15:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:15:51,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:51,196 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:51,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-09 18:15:51,397 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1676107171, now seen corresponding path program 71 times [2021-07-09 18:15:51,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:51,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465849243] [2021-07-09 18:15:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 18:15:51,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465849243] [2021-07-09 18:15:51,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465849243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:51,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946234926] [2021-07-09 18:15:51,774 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:51,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:15:51,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:51,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:15:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:52,547 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:15:52,548 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 51 treesize of output 31 [2021-07-09 18:15:52,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:52,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:52,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:52,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:37 [2021-07-09 18:15:52,637 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:15:52,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:15:52,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:52,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:52,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:52,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:15:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:52,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946234926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:52,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:52,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:15:52,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738725175] [2021-07-09 18:15:52,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:15:52,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:15:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:15:52,758 INFO L87 Difference]: Start difference. First operand 25752 states and 85069 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:05,228 INFO L93 Difference]: Finished difference Result 97493 states and 327125 transitions. [2021-07-09 18:16:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 218 states. [2021-07-09 18:16:05,229 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-09 18:16:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:05,549 INFO L225 Difference]: With dead ends: 97493 [2021-07-09 18:16:05,549 INFO L226 Difference]: Without dead ends: 93309 [2021-07-09 18:16:05,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27532 ImplicationChecksByTransitivity, 10461.4ms TimeCoverageRelationStatistics Valid=6915, Invalid=60425, Unknown=0, NotChecked=0, Total=67340 [2021-07-09 18:16:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93309 states. [2021-07-09 18:16:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93309 to 25720. [2021-07-09 18:16:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25720 states, 25719 states have (on average 3.3054551110074266) internal successors, (85013), 25719 states have internal predecessors, (85013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25720 states to 25720 states and 85013 transitions. [2021-07-09 18:16:06,939 INFO L78 Accepts]: Start accepts. Automaton has 25720 states and 85013 transitions. Word has length 54 [2021-07-09 18:16:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:06,939 INFO L482 AbstractCegarLoop]: Abstraction has 25720 states and 85013 transitions. [2021-07-09 18:16:06,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 25720 states and 85013 transitions. [2021-07-09 18:16:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:16:06,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:06,991 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:07,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 18:16:07,192 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1736363597, now seen corresponding path program 72 times [2021-07-09 18:16:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:07,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441284548] [2021-07-09 18:16:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:16:07,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441284548] [2021-07-09 18:16:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441284548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:07,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491595064] [2021-07-09 18:16:07,579 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:07,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:16:07,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:07,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:16:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:08,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2021-07-09 18:16:08,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:08,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:83, output treesize:42 [2021-07-09 18:16:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:16:08,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:16:08,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:08,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:08,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-07-09 18:16:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:08,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491595064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:08,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:08,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-07-09 18:16:08,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042139063] [2021-07-09 18:16:08,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 18:16:08,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:08,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 18:16:08,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1885, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:16:08,643 INFO L87 Difference]: Start difference. First operand 25720 states and 85013 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 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) [2021-07-09 18:16:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:21,281 INFO L93 Difference]: Finished difference Result 111560 states and 377221 transitions. [2021-07-09 18:16:21,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-07-09 18:16:21,281 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 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 54 [2021-07-09 18:16:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:21,845 INFO L225 Difference]: With dead ends: 111560 [2021-07-09 18:16:21,845 INFO L226 Difference]: Without dead ends: 106928 [2021-07-09 18:16:21,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23672 ImplicationChecksByTransitivity, 9532.4ms TimeCoverageRelationStatistics Valid=6280, Invalid=53500, Unknown=0, NotChecked=0, Total=59780 [2021-07-09 18:16:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106928 states. [2021-07-09 18:16:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106928 to 28580. [2021-07-09 18:16:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28580 states, 28579 states have (on average 3.298120997935547) internal successors, (94257), 28579 states have internal predecessors, (94257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28580 states to 28580 states and 94257 transitions. [2021-07-09 18:16:23,233 INFO L78 Accepts]: Start accepts. Automaton has 28580 states and 94257 transitions. Word has length 54 [2021-07-09 18:16:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:23,233 INFO L482 AbstractCegarLoop]: Abstraction has 28580 states and 94257 transitions. [2021-07-09 18:16:23,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 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) [2021-07-09 18:16:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 28580 states and 94257 transitions. [2021-07-09 18:16:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-09 18:16:23,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:23,283 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:23,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:23,484 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1006256589, now seen corresponding path program 73 times [2021-07-09 18:16:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:23,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729448696] [2021-07-09 18:16:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:16:24,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:24,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729448696] [2021-07-09 18:16:24,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729448696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:24,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925782950] [2021-07-09 18:16:24,034 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:16:24,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:24,782 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:16:24,782 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 51 treesize of output 31 [2021-07-09 18:16:24,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:24,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:24,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:24,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:38 [2021-07-09 18:16:24,919 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:16:24,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-07-09 18:16:24,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:24,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:24,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:24,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-07-09 18:16:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:24,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925782950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:24,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:24,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2021-07-09 18:16:24,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993480702] [2021-07-09 18:16:24,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-07-09 18:16:24,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:24,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-07-09 18:16:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:16:24,999 INFO L87 Difference]: Start difference. First operand 28580 states and 94257 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-09 18:16:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-07-09 18:16:34,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:34,821 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:16:34,823 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:16:34,824 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:16:34,824 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:16:34 BasicIcfg [2021-07-09 18:16:34,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:16:34,825 INFO L168 Benchmark]: Toolchain (without parser) took 755435.05 ms. Allocated memory was 199.2 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 178.0 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-09 18:16:34,825 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 179.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:16:34,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.29 ms. Allocated memory is still 199.2 MB. Free memory was 178.0 MB in the beginning and 176.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:34,825 INFO L168 Benchmark]: Boogie Preprocessor took 21.93 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 175.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:34,825 INFO L168 Benchmark]: RCFGBuilder took 283.86 ms. Allocated memory is still 199.2 MB. Free memory was 175.4 MB in the beginning and 159.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:34,825 INFO L168 Benchmark]: TraceAbstraction took 755104.17 ms. Allocated memory was 199.2 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 159.3 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. [2021-07-09 18:16:34,825 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 199.2 MB. Free memory is still 179.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.29 ms. Allocated memory is still 199.2 MB. Free memory was 178.0 MB in the beginning and 176.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.93 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 175.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.86 ms. Allocated memory is still 199.2 MB. Free memory was 175.4 MB in the beginning and 159.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 755104.17 ms. Allocated memory was 199.2 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 159.3 MB in the beginning and 1.8 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (28580states) and FLOYD_HOARE automaton (currently 180 states, 47 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 223 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 755001.1ms, OverallIterations: 77, TraceHistogramMax: 3, EmptinessCheckTime: 3131.5ms, AutomataDifference: 605000.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 51.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7598 SDtfs, 91933 SDslu, 138923 SDs, 0 SdLazy, 290094 SolverSat, 27566 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 123392.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15583 GetRequests, 2407 SyntacticMatches, 151 SemanticMatches, 13024 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111035 ImplicationChecksByTransitivity, 458322.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28580occurred in iteration=76, InterpolantAutomatonStates: 10507, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 56456.2ms AutomataMinimizationTime, 76 MinimizatonAttempts, 3619668 StatesRemovedByMinimization, 72 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 421.1ms SsaConstructionTime, 1601.8ms SatisfiabilityAnalysisTime, 71511.6ms InterpolantComputationTime, 7222 NumberOfCodeBlocks, 7222 NumberOfCodeBlocksAsserted, 286 NumberOfCheckSat, 7072 ConstructedInterpolants, 52 QuantifiedInterpolants, 109116 SizeOfPredicates, 770 NumberOfNonLiveVariables, 9728 ConjunctsInSsa, 2528 ConjunctsInUnsatCore, 150 InterpolantComputations, 6 PerfectInterpolantSequences, 1023/3971 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