/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:40:12,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:40:12,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:40:12,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:40:12,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-09 18:40:12,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-09 18:40:12,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-09 18:40:12,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-09 18:40:12,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-09 18:40:12,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-09 18:40:12,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-09 18:40:12,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-09 18:40:12,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-09 18:40:12,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-09 18:40:12,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-09 18:40:12,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-09 18:40:12,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-09 18:40:12,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:40:12,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:40:12,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:40:12,381 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 18:40:12,424 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:40:12,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:40:12,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:40:12,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:40:12,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:40:12,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:40:12,427 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:40:12,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:40:12,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:40:12,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:40:12,428 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:40:12,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:40:12,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:40:12,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:40:12,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:40:12,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:40:12,430 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:40:12,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:40:12,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:40:12,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:40:12,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:40:12,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:40:12,700 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:40:12,701 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:40:12,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl [2021-07-09 18:40:12,702 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/queue-add-3-nl.wvr.bpl' [2021-07-09 18:40:12,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:40:12,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:40:12,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:40:12,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:40:12,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:40:12,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:40:12,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:40:12,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:40:12,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:40:12,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/1) ... [2021-07-09 18:40:12,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:40:12,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:40:12,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:40:12,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:40:12,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (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 18:40:12,839 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:40:12,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:40:12,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:40:12,839 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:40:12,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:40:12,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:40:12,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:40:12,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:40:12,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:40:12,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:40:12,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:40:12,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:40:12,842 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 18:40:13,093 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:40:13,093 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:40:13,095 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:40:13 BoogieIcfgContainer [2021-07-09 18:40:13,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:40:13,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:40:13,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:40:13,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:40:13,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:12" (1/2) ... [2021-07-09 18:40:13,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9439001 and model type queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:40:13, skipping insertion in model container [2021-07-09 18:40:13,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:40:13" (2/2) ... [2021-07-09 18:40:13,100 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3-nl.wvr.bpl [2021-07-09 18:40:13,103 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:40:13,103 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:40:13,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:40:13,104 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:40:13,143 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:40:13,157 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:40:13,174 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:40:13,175 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:40:13,175 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:40:13,175 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:40:13,175 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:40:13,175 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:40:13,175 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:40:13,175 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:40:13,181 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 42 transitions, 108 flow [2021-07-09 18:40:13,226 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 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 18:40:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 0 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 18:40:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:40:13,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,247 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] [2021-07-09 18:40:13,247 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2091865262, now seen corresponding path program 1 times [2021-07-09 18:40:13,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81629466] [2021-07-09 18:40:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,348 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 18:40:13,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81629466] [2021-07-09 18:40:13,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81629466] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:13,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:13,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:40:13,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134685126] [2021-07-09 18:40:13,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:40:13,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:40:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:40:13,366 INFO L87 Difference]: Start difference. First operand has 1013 states, 1012 states have (on average 2.975296442687747) internal successors, (3011), 1012 states have internal predecessors, (3011), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:40:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,399 INFO L93 Difference]: Finished difference Result 1112 states and 3308 transitions. [2021-07-09 18:40:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:40:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:40:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,418 INFO L225 Difference]: With dead ends: 1112 [2021-07-09 18:40:13,418 INFO L226 Difference]: Without dead ends: 1112 [2021-07-09 18:40:13,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:40:13,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-07-09 18:40:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2021-07-09 18:40:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9774977497749773) internal successors, (3308), 1111 states have internal predecessors, (3308), 0 states have call successors, (0), 0 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 18:40:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3308 transitions. [2021-07-09 18:40:13,552 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3308 transitions. Word has length 22 [2021-07-09 18:40:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:13,552 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 3308 transitions. [2021-07-09 18:40:13,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 18:40:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3308 transitions. [2021-07-09 18:40:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:13,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,556 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] [2021-07-09 18:40:13,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:40:13,556 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1320680534, now seen corresponding path program 1 times [2021-07-09 18:40:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977150005] [2021-07-09 18:40:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,587 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 18:40:13,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:13,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977150005] [2021-07-09 18:40:13,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977150005] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:13,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:13,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:40:13,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648142978] [2021-07-09 18:40:13,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:40:13,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:40:13,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:40:13,591 INFO L87 Difference]: Start difference. First operand 1112 states and 3308 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 18:40:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,605 INFO L93 Difference]: Finished difference Result 1165 states and 3465 transitions. [2021-07-09 18:40:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:40:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,614 INFO L225 Difference]: With dead ends: 1165 [2021-07-09 18:40:13,614 INFO L226 Difference]: Without dead ends: 1165 [2021-07-09 18:40:13,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:40:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-07-09 18:40:13,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-07-09 18:40:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.9768041237113403) internal successors, (3465), 1164 states have internal predecessors, (3465), 0 states have call successors, (0), 0 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 18:40:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3465 transitions. [2021-07-09 18:40:13,662 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3465 transitions. Word has length 28 [2021-07-09 18:40:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:13,663 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 3465 transitions. [2021-07-09 18:40:13,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 18:40:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3465 transitions. [2021-07-09 18:40:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:40:13,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,666 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] [2021-07-09 18:40:13,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:40:13,666 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,677 INFO L82 PathProgramCache]: Analyzing trace with hash 581036814, now seen corresponding path program 2 times [2021-07-09 18:40:13,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285326058] [2021-07-09 18:40:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:13,727 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 18:40:13,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:13,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285326058] [2021-07-09 18:40:13,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285326058] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:13,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:13,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:40:13,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488956765] [2021-07-09 18:40:13,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:40:13,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:13,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:40:13,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:40:13,733 INFO L87 Difference]: Start difference. First operand 1165 states and 3465 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 18:40:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:13,756 INFO L93 Difference]: Finished difference Result 1281 states and 3812 transitions. [2021-07-09 18:40:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:40:13,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:40:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:13,763 INFO L225 Difference]: With dead ends: 1281 [2021-07-09 18:40:13,773 INFO L226 Difference]: Without dead ends: 1281 [2021-07-09 18:40:13,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:40:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-07-09 18:40:13,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-07-09 18:40:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 2.978125) internal successors, (3812), 1280 states have internal predecessors, (3812), 0 states have call successors, (0), 0 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 18:40:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 3812 transitions. [2021-07-09 18:40:13,805 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 3812 transitions. Word has length 28 [2021-07-09 18:40:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:13,806 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 3812 transitions. [2021-07-09 18:40:13,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 18:40:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 3812 transitions. [2021-07-09 18:40:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:13,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:13,810 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] [2021-07-09 18:40:13,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:40:13,810 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash -601386848, now seen corresponding path program 1 times [2021-07-09 18:40:13,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:13,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534757021] [2021-07-09 18:40:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:14,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534757021] [2021-07-09 18:40:14,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534757021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813660070] [2021-07-09 18:40:14,349 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 18:40:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:14,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:14,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813660070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:14,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:14,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841908085] [2021-07-09 18:40:14,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:14,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:14,752 INFO L87 Difference]: Start difference. First operand 1281 states and 3812 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:15,497 INFO L93 Difference]: Finished difference Result 2269 states and 6580 transitions. [2021-07-09 18:40:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:40:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:15,507 INFO L225 Difference]: With dead ends: 2269 [2021-07-09 18:40:15,507 INFO L226 Difference]: Without dead ends: 2254 [2021-07-09 18:40:15,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:40:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-09 18:40:15,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1446. [2021-07-09 18:40:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 2.9577854671280277) internal successors, (4274), 1445 states have internal predecessors, (4274), 0 states have call successors, (0), 0 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 18:40:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4274 transitions. [2021-07-09 18:40:15,549 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4274 transitions. Word has length 33 [2021-07-09 18:40:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:15,549 INFO L482 AbstractCegarLoop]: Abstraction has 1446 states and 4274 transitions. [2021-07-09 18:40:15,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4274 transitions. [2021-07-09 18:40:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:15,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:15,552 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] [2021-07-09 18:40:15,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:15,769 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:15,769 INFO L82 PathProgramCache]: Analyzing trace with hash -493936480, now seen corresponding path program 2 times [2021-07-09 18:40:15,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:15,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086920997] [2021-07-09 18:40:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:16,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086920997] [2021-07-09 18:40:16,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086920997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742597405] [2021-07-09 18:40:16,023 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 18:40:16,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:16,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:16,225 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 5 treesize of output 3 [2021-07-09 18:40:16,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:16,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:16,235 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 18:40:16,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:40:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:16,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742597405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:16,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:16,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269226494] [2021-07-09 18:40:16,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:16,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:16,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:16,401 INFO L87 Difference]: Start difference. First operand 1446 states and 4274 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:17,341 INFO L93 Difference]: Finished difference Result 2068 states and 5919 transitions. [2021-07-09 18:40:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:40:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:17,350 INFO L225 Difference]: With dead ends: 2068 [2021-07-09 18:40:17,350 INFO L226 Difference]: Without dead ends: 2053 [2021-07-09 18:40:17,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 833.3ms TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:17,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-07-09 18:40:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1458. [2021-07-09 18:40:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.960878517501716) internal successors, (4314), 1457 states have internal predecessors, (4314), 0 states have call successors, (0), 0 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 18:40:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4314 transitions. [2021-07-09 18:40:17,391 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4314 transitions. Word has length 33 [2021-07-09 18:40:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:17,391 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4314 transitions. [2021-07-09 18:40:17,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4314 transitions. [2021-07-09 18:40:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:17,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:17,394 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] [2021-07-09 18:40:17,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:17,611 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1370118944, now seen corresponding path program 3 times [2021-07-09 18:40:17,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:17,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293841191] [2021-07-09 18:40:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:17,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:17,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293841191] [2021-07-09 18:40:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293841191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:17,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188607354] [2021-07-09 18:40:17,784 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 18:40:17,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:40:17,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:17,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:17,970 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 5 treesize of output 3 [2021-07-09 18:40:17,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:17,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:17,979 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 18:40:17,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:40:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:18,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188607354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:18,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:18,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:18,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776049001] [2021-07-09 18:40:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:18,163 INFO L87 Difference]: Start difference. First operand 1458 states and 4314 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:18,827 INFO L93 Difference]: Finished difference Result 2308 states and 6666 transitions. [2021-07-09 18:40:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:40:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:18,836 INFO L225 Difference]: With dead ends: 2308 [2021-07-09 18:40:18,836 INFO L226 Difference]: Without dead ends: 2289 [2021-07-09 18:40:18,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-07-09 18:40:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1458. [2021-07-09 18:40:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 2.959505833905285) internal successors, (4312), 1457 states have internal predecessors, (4312), 0 states have call successors, (0), 0 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 18:40:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 4312 transitions. [2021-07-09 18:40:18,869 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 4312 transitions. Word has length 33 [2021-07-09 18:40:18,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:18,869 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 4312 transitions. [2021-07-09 18:40:18,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 4312 transitions. [2021-07-09 18:40:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:18,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:18,872 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] [2021-07-09 18:40:19,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:19,087 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:19,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1228403804, now seen corresponding path program 4 times [2021-07-09 18:40:19,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:19,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105347364] [2021-07-09 18:40:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105347364] [2021-07-09 18:40:19,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105347364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696783622] [2021-07-09 18:40:19,240 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 18:40:19,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:19,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:19,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696783622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:19,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:19,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:19,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587483044] [2021-07-09 18:40:19,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:19,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:19,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:19,488 INFO L87 Difference]: Start difference. First operand 1458 states and 4312 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:20,299 INFO L93 Difference]: Finished difference Result 2568 states and 7386 transitions. [2021-07-09 18:40:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:40:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:20,310 INFO L225 Difference]: With dead ends: 2568 [2021-07-09 18:40:20,310 INFO L226 Difference]: Without dead ends: 2553 [2021-07-09 18:40:20,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-09 18:40:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1477. [2021-07-09 18:40:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 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 18:40:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-07-09 18:40:20,341 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-07-09 18:40:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:20,342 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-07-09 18:40:20,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-07-09 18:40:20,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:20,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:20,344 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] [2021-07-09 18:40:20,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:20,561 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:20,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:20,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1783416032, now seen corresponding path program 5 times [2021-07-09 18:40:20,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:20,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523036610] [2021-07-09 18:40:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:20,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:20,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523036610] [2021-07-09 18:40:20,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523036610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:20,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470262960] [2021-07-09 18:40:20,705 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 18:40:20,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:20,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470262960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:20,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:20,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:20,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368812812] [2021-07-09 18:40:20,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:20,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:20,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:20,924 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:21,565 INFO L93 Difference]: Finished difference Result 2510 states and 7227 transitions. [2021-07-09 18:40:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:40:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:21,574 INFO L225 Difference]: With dead ends: 2510 [2021-07-09 18:40:21,574 INFO L226 Difference]: Without dead ends: 2495 [2021-07-09 18:40:21,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:40:21,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-07-09 18:40:21,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1477. [2021-07-09 18:40:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.959349593495935) internal successors, (4368), 1476 states have internal predecessors, (4368), 0 states have call successors, (0), 0 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 18:40:21,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4368 transitions. [2021-07-09 18:40:21,604 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4368 transitions. Word has length 33 [2021-07-09 18:40:21,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:21,605 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4368 transitions. [2021-07-09 18:40:21,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4368 transitions. [2021-07-09 18:40:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:21,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:21,609 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] [2021-07-09 18:40:21,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:21,825 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:21,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:21,825 INFO L82 PathProgramCache]: Analyzing trace with hash -848944454, now seen corresponding path program 6 times [2021-07-09 18:40:21,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:21,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849093547] [2021-07-09 18:40:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:21,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849093547] [2021-07-09 18:40:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849093547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:21,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720639517] [2021-07-09 18:40:21,984 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 18:40:22,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:40:22,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:22,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:40:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:22,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720639517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:22,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:22,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:22,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034112937] [2021-07-09 18:40:22,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:22,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:22,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:22,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:22,276 INFO L87 Difference]: Start difference. First operand 1477 states and 4368 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:22,765 INFO L93 Difference]: Finished difference Result 2484 states and 7184 transitions. [2021-07-09 18:40:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:40:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:22,775 INFO L225 Difference]: With dead ends: 2484 [2021-07-09 18:40:22,775 INFO L226 Difference]: Without dead ends: 2469 [2021-07-09 18:40:22,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-07-09 18:40:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1561. [2021-07-09 18:40:22,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.943589743589744) internal successors, (4592), 1560 states have internal predecessors, (4592), 0 states have call successors, (0), 0 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 18:40:22,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4592 transitions. [2021-07-09 18:40:22,809 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4592 transitions. Word has length 33 [2021-07-09 18:40:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:22,810 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4592 transitions. [2021-07-09 18:40:22,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4592 transitions. [2021-07-09 18:40:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:22,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:22,813 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] [2021-07-09 18:40:23,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:23,031 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:23,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -822875578, now seen corresponding path program 7 times [2021-07-09 18:40:23,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:23,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491107599] [2021-07-09 18:40:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:23,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491107599] [2021-07-09 18:40:23,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491107599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730170195] [2021-07-09 18:40:23,182 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 18:40:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:23,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:23,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730170195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:23,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:23,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041882403] [2021-07-09 18:40:23,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:23,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:23,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:23,450 INFO L87 Difference]: Start difference. First operand 1561 states and 4592 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:24,271 INFO L93 Difference]: Finished difference Result 2207 states and 6308 transitions. [2021-07-09 18:40:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:40:24,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:24,277 INFO L225 Difference]: With dead ends: 2207 [2021-07-09 18:40:24,277 INFO L226 Difference]: Without dead ends: 2192 [2021-07-09 18:40:24,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-07-09 18:40:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 1624. [2021-07-09 18:40:24,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 2.9457794208256316) internal successors, (4781), 1623 states have internal predecessors, (4781), 0 states have call successors, (0), 0 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 18:40:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4781 transitions. [2021-07-09 18:40:24,322 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4781 transitions. Word has length 33 [2021-07-09 18:40:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:24,322 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 4781 transitions. [2021-07-09 18:40:24,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4781 transitions. [2021-07-09 18:40:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:24,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:24,326 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] [2021-07-09 18:40:24,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 18:40:24,542 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1051634422, now seen corresponding path program 8 times [2021-07-09 18:40:24,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:24,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103768595] [2021-07-09 18:40:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:24,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:24,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103768595] [2021-07-09 18:40:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103768595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:24,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609162028] [2021-07-09 18:40:24,687 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 18:40:24,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:24,840 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 5 treesize of output 3 [2021-07-09 18:40:24,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:24,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:24,849 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 18:40:24,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:40:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:24,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609162028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:24,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:24,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:24,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718740907] [2021-07-09 18:40:24,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:24,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:24,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:24,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:24,982 INFO L87 Difference]: Start difference. First operand 1624 states and 4781 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:25,433 INFO L93 Difference]: Finished difference Result 2484 states and 7152 transitions. [2021-07-09 18:40:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:40:25,433 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:25,439 INFO L225 Difference]: With dead ends: 2484 [2021-07-09 18:40:25,439 INFO L226 Difference]: Without dead ends: 2469 [2021-07-09 18:40:25,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:25,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-07-09 18:40:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1666. [2021-07-09 18:40:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 2.926126126126126) internal successors, (4872), 1665 states have internal predecessors, (4872), 0 states have call successors, (0), 0 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 18:40:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 4872 transitions. [2021-07-09 18:40:25,466 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 4872 transitions. Word has length 33 [2021-07-09 18:40:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:25,466 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 4872 transitions. [2021-07-09 18:40:25,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 4872 transitions. [2021-07-09 18:40:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:25,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:25,469 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] [2021-07-09 18:40:25,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-09 18:40:25,686 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1998366222, now seen corresponding path program 9 times [2021-07-09 18:40:25,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:25,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697491287] [2021-07-09 18:40:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:25,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:25,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697491287] [2021-07-09 18:40:25,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697491287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:25,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935911373] [2021-07-09 18:40:25,827 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 18:40:25,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:40:25,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:25,991 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 5 treesize of output 3 [2021-07-09 18:40:25,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:26,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:26,001 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 18:40:26,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-07-09 18:40:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:26,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935911373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:26,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:26,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:26,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512433345] [2021-07-09 18:40:26,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:26,116 INFO L87 Difference]: Start difference. First operand 1666 states and 4872 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:26,671 INFO L93 Difference]: Finished difference Result 2668 states and 7671 transitions. [2021-07-09 18:40:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:40:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:26,677 INFO L225 Difference]: With dead ends: 2668 [2021-07-09 18:40:26,677 INFO L226 Difference]: Without dead ends: 2653 [2021-07-09 18:40:26,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 599.1ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:40:26,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2653 states. [2021-07-09 18:40:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2653 to 1708. [2021-07-09 18:40:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 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 18:40:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-07-09 18:40:26,705 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-07-09 18:40:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:26,705 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-07-09 18:40:26,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-07-09 18:40:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:26,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:26,709 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] [2021-07-09 18:40:26,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:26,924 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2142163556, now seen corresponding path program 10 times [2021-07-09 18:40:26,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:26,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123087604] [2021-07-09 18:40:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123087604] [2021-07-09 18:40:27,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123087604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173098909] [2021-07-09 18:40:27,081 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 18:40:27,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:27,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:27,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:27,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:27,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173098909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:27,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:27,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:27,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164352838] [2021-07-09 18:40:27,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:27,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:27,279 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:27,898 INFO L93 Difference]: Finished difference Result 2631 states and 7576 transitions. [2021-07-09 18:40:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:40:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:27,903 INFO L225 Difference]: With dead ends: 2631 [2021-07-09 18:40:27,903 INFO L226 Difference]: Without dead ends: 2616 [2021-07-09 18:40:27,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:40:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-07-09 18:40:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 1708. [2021-07-09 18:40:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 2.919742237844171) internal successors, (4984), 1707 states have internal predecessors, (4984), 0 states have call successors, (0), 0 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 18:40:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 4984 transitions. [2021-07-09 18:40:27,931 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 4984 transitions. Word has length 33 [2021-07-09 18:40:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:27,932 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 4984 transitions. [2021-07-09 18:40:27,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 4984 transitions. [2021-07-09 18:40:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:27,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:27,934 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] [2021-07-09 18:40:28,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:28,149 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 618776186, now seen corresponding path program 11 times [2021-07-09 18:40:28,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:28,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821732634] [2021-07-09 18:40:28,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:28,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821732634] [2021-07-09 18:40:28,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821732634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6682447] [2021-07-09 18:40:28,295 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 18:40:28,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:28,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6682447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:28,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:28,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139936769] [2021-07-09 18:40:28,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:28,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:28,519 INFO L87 Difference]: Start difference. First operand 1708 states and 4984 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:29,354 INFO L93 Difference]: Finished difference Result 2160 states and 6221 transitions. [2021-07-09 18:40:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:40:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:29,359 INFO L225 Difference]: With dead ends: 2160 [2021-07-09 18:40:29,359 INFO L226 Difference]: Without dead ends: 2145 [2021-07-09 18:40:29,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-07-09 18:40:29,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1734. [2021-07-09 18:40:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.928447778418927) internal successors, (5075), 1733 states have internal predecessors, (5075), 0 states have call successors, (0), 0 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 18:40:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5075 transitions. [2021-07-09 18:40:29,384 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5075 transitions. Word has length 33 [2021-07-09 18:40:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:29,384 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5075 transitions. [2021-07-09 18:40:29,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5075 transitions. [2021-07-09 18:40:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:29,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:29,387 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] [2021-07-09 18:40:29,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 18:40:29,601 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:29,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:29,601 INFO L82 PathProgramCache]: Analyzing trace with hash -257406278, now seen corresponding path program 12 times [2021-07-09 18:40:29,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:29,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968529742] [2021-07-09 18:40:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:29,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:29,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968529742] [2021-07-09 18:40:29,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968529742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:29,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938221226] [2021-07-09 18:40:29,743 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 18:40:29,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:40:29,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:29,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:29,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:29,877 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 5 treesize of output 3 [2021-07-09 18:40:29,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:29,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:29,886 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 18:40:29,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:40:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:30,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938221226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:30,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:30,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:30,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629231614] [2021-07-09 18:40:30,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:30,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:30,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:30,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:30,067 INFO L87 Difference]: Start difference. First operand 1734 states and 5075 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:30,798 INFO L93 Difference]: Finished difference Result 2188 states and 6280 transitions. [2021-07-09 18:40:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:40:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:30,803 INFO L225 Difference]: With dead ends: 2188 [2021-07-09 18:40:30,803 INFO L226 Difference]: Without dead ends: 2169 [2021-07-09 18:40:30,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 803.9ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-07-09 18:40:30,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1730. [2021-07-09 18:40:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 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 18:40:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-07-09 18:40:30,831 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-07-09 18:40:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:30,831 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-07-09 18:40:30,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-07-09 18:40:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:30,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:30,834 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] [2021-07-09 18:40:31,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:40:31,041 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:31,042 INFO L82 PathProgramCache]: Analyzing trace with hash 986641082, now seen corresponding path program 13 times [2021-07-09 18:40:31,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:31,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672778642] [2021-07-09 18:40:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672778642] [2021-07-09 18:40:31,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672778642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77829136] [2021-07-09 18:40:31,178 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 18:40:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:31,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:31,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:31,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:31,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77829136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:31,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:31,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:31,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264843647] [2021-07-09 18:40:31,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:31,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:31,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:31,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:31,511 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:32,401 INFO L93 Difference]: Finished difference Result 2225 states and 6381 transitions. [2021-07-09 18:40:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:40:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:32,406 INFO L225 Difference]: With dead ends: 2225 [2021-07-09 18:40:32,406 INFO L226 Difference]: Without dead ends: 2210 [2021-07-09 18:40:32,406 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-07-09 18:40:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1751. [2021-07-09 18:40:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 2.934857142857143) internal successors, (5136), 1750 states have internal predecessors, (5136), 0 states have call successors, (0), 0 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 18:40:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5136 transitions. [2021-07-09 18:40:32,432 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5136 transitions. Word has length 33 [2021-07-09 18:40:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:32,433 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 5136 transitions. [2021-07-09 18:40:32,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5136 transitions. [2021-07-09 18:40:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:32,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:32,435 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] [2021-07-09 18:40:32,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:40:32,649 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1544656284, now seen corresponding path program 14 times [2021-07-09 18:40:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:32,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76398333] [2021-07-09 18:40:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:32,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:32,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76398333] [2021-07-09 18:40:32,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76398333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:32,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838972950] [2021-07-09 18:40:32,828 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 18:40:32,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:32,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:32,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:32,954 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 5 treesize of output 3 [2021-07-09 18:40:32,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:32,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:32,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:40:32,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:40:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:33,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838972950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:33,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:33,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:33,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126088732] [2021-07-09 18:40:33,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:33,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:33,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:33,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:33,123 INFO L87 Difference]: Start difference. First operand 1751 states and 5136 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:33,872 INFO L93 Difference]: Finished difference Result 2279 states and 6491 transitions. [2021-07-09 18:40:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:40:33,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:33,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:33,876 INFO L225 Difference]: With dead ends: 2279 [2021-07-09 18:40:33,876 INFO L226 Difference]: Without dead ends: 2264 [2021-07-09 18:40:33,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-09 18:40:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1730. [2021-07-09 18:40:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.925968768074031) internal successors, (5059), 1729 states have internal predecessors, (5059), 0 states have call successors, (0), 0 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 18:40:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5059 transitions. [2021-07-09 18:40:33,900 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5059 transitions. Word has length 33 [2021-07-09 18:40:33,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:33,901 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5059 transitions. [2021-07-09 18:40:33,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5059 transitions. [2021-07-09 18:40:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:33,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:33,903 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] [2021-07-09 18:40:34,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:34,121 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1484359942, now seen corresponding path program 15 times [2021-07-09 18:40:34,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:34,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257326705] [2021-07-09 18:40:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:34,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:34,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257326705] [2021-07-09 18:40:34,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257326705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281812501] [2021-07-09 18:40:34,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:40:34,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:40:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:40:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:34,398 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 5 treesize of output 3 [2021-07-09 18:40:34,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:34,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:34,408 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 18:40:34,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:40:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281812501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:34,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:34,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480525653] [2021-07-09 18:40:34,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:34,561 INFO L87 Difference]: Start difference. First operand 1730 states and 5059 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:34,983 INFO L93 Difference]: Finished difference Result 2313 states and 6721 transitions. [2021-07-09 18:40:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:40:34,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:34,987 INFO L225 Difference]: With dead ends: 2313 [2021-07-09 18:40:34,987 INFO L226 Difference]: Without dead ends: 2294 [2021-07-09 18:40:34,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 495.0ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:40:34,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-07-09 18:40:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1752. [2021-07-09 18:40:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 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 18:40:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-07-09 18:40:35,013 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-07-09 18:40:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:35,013 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-07-09 18:40:35,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-07-09 18:40:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:35,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:35,030 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] [2021-07-09 18:40:35,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:40:35,237 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:35,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:35,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2091797702, now seen corresponding path program 16 times [2021-07-09 18:40:35,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:35,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332033807] [2021-07-09 18:40:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332033807] [2021-07-09 18:40:35,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332033807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734270426] [2021-07-09 18:40:35,374 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 18:40:35,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:35,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:35,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:35,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734270426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:35,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:35,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:35,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308026868] [2021-07-09 18:40:35,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:35,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:35,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:35,598 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:36,057 INFO L93 Difference]: Finished difference Result 2339 states and 6772 transitions. [2021-07-09 18:40:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:40:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:36,061 INFO L225 Difference]: With dead ends: 2339 [2021-07-09 18:40:36,061 INFO L226 Difference]: Without dead ends: 2324 [2021-07-09 18:40:36,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 480.3ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:40:36,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-07-09 18:40:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 1752. [2021-07-09 18:40:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 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 18:40:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-07-09 18:40:36,086 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-07-09 18:40:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:36,086 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-07-09 18:40:36,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-07-09 18:40:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:36,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:36,088 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] [2021-07-09 18:40:36,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:36,293 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:36,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1554634930, now seen corresponding path program 17 times [2021-07-09 18:40:36,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:36,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996602484] [2021-07-09 18:40:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:36,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:36,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996602484] [2021-07-09 18:40:36,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996602484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598632964] [2021-07-09 18:40:36,462 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 18:40:36,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:36,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:36,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598632964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:36,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:36,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:36,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873931550] [2021-07-09 18:40:36,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:36,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:36,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:36,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:36,684 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:37,712 INFO L93 Difference]: Finished difference Result 2321 states and 6657 transitions. [2021-07-09 18:40:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:40:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:37,716 INFO L225 Difference]: With dead ends: 2321 [2021-07-09 18:40:37,716 INFO L226 Difference]: Without dead ends: 2306 [2021-07-09 18:40:37,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:40:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-07-09 18:40:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1760. [2021-07-09 18:40:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 2.922114837976123) internal successors, (5140), 1759 states have internal predecessors, (5140), 0 states have call successors, (0), 0 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 18:40:37,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 5140 transitions. [2021-07-09 18:40:37,738 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 5140 transitions. Word has length 33 [2021-07-09 18:40:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:37,739 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 5140 transitions. [2021-07-09 18:40:37,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 5140 transitions. [2021-07-09 18:40:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:37,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:37,741 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] [2021-07-09 18:40:37,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:37,961 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1864149902, now seen corresponding path program 18 times [2021-07-09 18:40:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:37,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707651658] [2021-07-09 18:40:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:38,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707651658] [2021-07-09 18:40:38,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707651658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633705063] [2021-07-09 18:40:38,107 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 18:40:38,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:40:38,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:38,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:38,223 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 5 treesize of output 3 [2021-07-09 18:40:38,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:38,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:38,230 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 18:40:38,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:40:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:38,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633705063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076490107] [2021-07-09 18:40:38,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:38,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:38,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:38,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:38,381 INFO L87 Difference]: Start difference. First operand 1760 states and 5140 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:39,057 INFO L93 Difference]: Finished difference Result 2573 states and 7435 transitions. [2021-07-09 18:40:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:40:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:39,062 INFO L225 Difference]: With dead ends: 2573 [2021-07-09 18:40:39,062 INFO L226 Difference]: Without dead ends: 2554 [2021-07-09 18:40:39,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2021-07-09 18:40:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1752. [2021-07-09 18:40:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 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 18:40:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-07-09 18:40:39,085 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-07-09 18:40:39,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:39,085 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-07-09 18:40:39,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:39,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-07-09 18:40:39,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:39,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:39,088 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] [2021-07-09 18:40:39,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:40:39,294 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash 584235966, now seen corresponding path program 19 times [2021-07-09 18:40:39,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:39,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949087982] [2021-07-09 18:40:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:39,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949087982] [2021-07-09 18:40:39,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949087982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674429237] [2021-07-09 18:40:39,432 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 18:40:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:39,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:39,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:39,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674429237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:39,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:39,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:39,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062954417] [2021-07-09 18:40:39,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:39,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:39,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:39,659 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:40,700 INFO L93 Difference]: Finished difference Result 2455 states and 6989 transitions. [2021-07-09 18:40:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:40:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:40,704 INFO L225 Difference]: With dead ends: 2455 [2021-07-09 18:40:40,704 INFO L226 Difference]: Without dead ends: 2440 [2021-07-09 18:40:40,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 976.2ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:40:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-07-09 18:40:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1794. [2021-07-09 18:40:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 2.92526491912995) internal successors, (5245), 1793 states have internal predecessors, (5245), 0 states have call successors, (0), 0 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 18:40:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 5245 transitions. [2021-07-09 18:40:40,745 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 5245 transitions. Word has length 33 [2021-07-09 18:40:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:40,745 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 5245 transitions. [2021-07-09 18:40:40,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 5245 transitions. [2021-07-09 18:40:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:40,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:40,747 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] [2021-07-09 18:40:40,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:40,948 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1947061400, now seen corresponding path program 20 times [2021-07-09 18:40:40,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:40,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700079346] [2021-07-09 18:40:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700079346] [2021-07-09 18:40:41,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700079346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599453870] [2021-07-09 18:40:41,092 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 18:40:41,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:41,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:41,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:41,213 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 5 treesize of output 3 [2021-07-09 18:40:41,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:41,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:41,221 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 18:40:41,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:40:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:41,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599453870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:41,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:41,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:41,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556200751] [2021-07-09 18:40:41,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:41,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:41,385 INFO L87 Difference]: Start difference. First operand 1794 states and 5245 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:42,101 INFO L93 Difference]: Finished difference Result 2707 states and 7767 transitions. [2021-07-09 18:40:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:40:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:42,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:42,106 INFO L225 Difference]: With dead ends: 2707 [2021-07-09 18:40:42,106 INFO L226 Difference]: Without dead ends: 2692 [2021-07-09 18:40:42,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-07-09 18:40:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 1752. [2021-07-09 18:40:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.9194745859508853) internal successors, (5112), 1751 states have internal predecessors, (5112), 0 states have call successors, (0), 0 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 18:40:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5112 transitions. [2021-07-09 18:40:42,129 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5112 transitions. Word has length 33 [2021-07-09 18:40:42,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:42,129 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5112 transitions. [2021-07-09 18:40:42,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:42,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5112 transitions. [2021-07-09 18:40:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:42,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:42,131 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] [2021-07-09 18:40:42,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:40:42,332 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:42,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1802207644, now seen corresponding path program 21 times [2021-07-09 18:40:42,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:42,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784240958] [2021-07-09 18:40:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784240958] [2021-07-09 18:40:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784240958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103809769] [2021-07-09 18:40:42,475 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 18:40:42,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:40:42,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:42,591 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 5 treesize of output 3 [2021-07-09 18:40:42,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:42,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:42,598 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 18:40:42,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:40:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:42,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103809769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:42,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:42,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642415024] [2021-07-09 18:40:42,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:42,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:42,747 INFO L87 Difference]: Start difference. First operand 1752 states and 5112 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:43,853 INFO L93 Difference]: Finished difference Result 2406 states and 6882 transitions. [2021-07-09 18:40:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:40:43,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:43,857 INFO L225 Difference]: With dead ends: 2406 [2021-07-09 18:40:43,857 INFO L226 Difference]: Without dead ends: 2391 [2021-07-09 18:40:43,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1029.0ms TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:40:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-09 18:40:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1756. [2021-07-09 18:40:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 2.921937321937322) internal successors, (5128), 1755 states have internal predecessors, (5128), 0 states have call successors, (0), 0 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 18:40:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5128 transitions. [2021-07-09 18:40:43,880 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5128 transitions. Word has length 33 [2021-07-09 18:40:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:43,880 INFO L482 AbstractCegarLoop]: Abstraction has 1756 states and 5128 transitions. [2021-07-09 18:40:43,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5128 transitions. [2021-07-09 18:40:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:43,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:43,883 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] [2021-07-09 18:40:44,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:40:44,089 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash 926025180, now seen corresponding path program 22 times [2021-07-09 18:40:44,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:44,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300785961] [2021-07-09 18:40:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300785961] [2021-07-09 18:40:44,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300785961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195869264] [2021-07-09 18:40:44,232 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 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 18:40:44,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:44,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:44,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:44,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195869264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:44,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:44,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:44,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173025413] [2021-07-09 18:40:44,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:44,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:44,467 INFO L87 Difference]: Start difference. First operand 1756 states and 5128 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:45,143 INFO L93 Difference]: Finished difference Result 2707 states and 7778 transitions. [2021-07-09 18:40:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:40:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:45,148 INFO L225 Difference]: With dead ends: 2707 [2021-07-09 18:40:45,148 INFO L226 Difference]: Without dead ends: 2688 [2021-07-09 18:40:45,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:40:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-07-09 18:40:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1744. [2021-07-09 18:40:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.919104991394148) internal successors, (5088), 1743 states have internal predecessors, (5088), 0 states have call successors, (0), 0 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 18:40:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 5088 transitions. [2021-07-09 18:40:45,171 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 5088 transitions. Word has length 33 [2021-07-09 18:40:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:45,171 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 5088 transitions. [2021-07-09 18:40:45,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 5088 transitions. [2021-07-09 18:40:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:45,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:45,174 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] [2021-07-09 18:40:45,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:45,376 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:45,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1499433222, now seen corresponding path program 23 times [2021-07-09 18:40:45,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:45,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345198083] [2021-07-09 18:40:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:45,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:45,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345198083] [2021-07-09 18:40:45,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345198083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:45,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072745025] [2021-07-09 18:40:45,519 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 18:40:45,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:45,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:45,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:45,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:45,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072745025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:45,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:45,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:40:45,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217723478] [2021-07-09 18:40:45,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:40:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:40:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:45,743 INFO L87 Difference]: Start difference. First operand 1744 states and 5088 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:46,670 INFO L93 Difference]: Finished difference Result 2266 states and 6481 transitions. [2021-07-09 18:40:46,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:40:46,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:46,673 INFO L225 Difference]: With dead ends: 2266 [2021-07-09 18:40:46,673 INFO L226 Difference]: Without dead ends: 2251 [2021-07-09 18:40:46,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 829.9ms TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:40:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-07-09 18:40:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1765. [2021-07-09 18:40:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 2.9280045351473922) internal successors, (5165), 1764 states have internal predecessors, (5165), 0 states have call successors, (0), 0 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 18:40:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 5165 transitions. [2021-07-09 18:40:46,696 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 5165 transitions. Word has length 33 [2021-07-09 18:40:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:46,696 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 5165 transitions. [2021-07-09 18:40:46,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 5165 transitions. [2021-07-09 18:40:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:46,699 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:46,699 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] [2021-07-09 18:40:46,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:40:46,913 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 264236708, now seen corresponding path program 24 times [2021-07-09 18:40:46,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:46,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050678091] [2021-07-09 18:40:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:47,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050678091] [2021-07-09 18:40:47,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050678091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975337049] [2021-07-09 18:40:47,055 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 18:40:47,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:40:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:40:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:47,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975337049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:47,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:47,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:40:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689642063] [2021-07-09 18:40:47,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:47,333 INFO L87 Difference]: Start difference. First operand 1765 states and 5165 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:48,038 INFO L93 Difference]: Finished difference Result 2604 states and 7487 transitions. [2021-07-09 18:40:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:40:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:48,042 INFO L225 Difference]: With dead ends: 2604 [2021-07-09 18:40:48,042 INFO L226 Difference]: Without dead ends: 2589 [2021-07-09 18:40:48,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:40:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-07-09 18:40:48,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1702. [2021-07-09 18:40:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 2.9253380364491477) internal successors, (4976), 1701 states have internal predecessors, (4976), 0 states have call successors, (0), 0 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 18:40:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 4976 transitions. [2021-07-09 18:40:48,066 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 4976 transitions. Word has length 33 [2021-07-09 18:40:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:48,066 INFO L482 AbstractCegarLoop]: Abstraction has 1702 states and 4976 transitions. [2021-07-09 18:40:48,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 4976 transitions. [2021-07-09 18:40:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:48,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:48,069 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] [2021-07-09 18:40:48,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:48,270 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1787297184, now seen corresponding path program 25 times [2021-07-09 18:40:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:48,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822217097] [2021-07-09 18:40:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822217097] [2021-07-09 18:40:48,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822217097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157247572] [2021-07-09 18:40:48,488 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 18:40:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:48,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:48,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157247572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:48,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:48,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:40:48,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155372085] [2021-07-09 18:40:48,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:40:48,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:48,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:40:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:40:48,782 INFO L87 Difference]: Start difference. First operand 1702 states and 4976 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:40:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:50,007 INFO L93 Difference]: Finished difference Result 3133 states and 8917 transitions. [2021-07-09 18:40:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:40:50,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:50,012 INFO L225 Difference]: With dead ends: 3133 [2021-07-09 18:40:50,012 INFO L226 Difference]: Without dead ends: 3118 [2021-07-09 18:40:50,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1090.9ms TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:40:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-07-09 18:40:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 1726. [2021-07-09 18:40:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 2.926376811594203) internal successors, (5048), 1725 states have internal predecessors, (5048), 0 states have call successors, (0), 0 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 18:40:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 5048 transitions. [2021-07-09 18:40:50,038 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 5048 transitions. Word has length 33 [2021-07-09 18:40:50,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:50,038 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 5048 transitions. [2021-07-09 18:40:50,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:40:50,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 5048 transitions. [2021-07-09 18:40:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:50,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:50,041 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] [2021-07-09 18:40:50,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:40:50,256 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1679846816, now seen corresponding path program 26 times [2021-07-09 18:40:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:50,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072521467] [2021-07-09 18:40:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:50,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072521467] [2021-07-09 18:40:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072521467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838467528] [2021-07-09 18:40:50,488 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 18:40:50,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:50,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:50,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:50,651 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 5 treesize of output 3 [2021-07-09 18:40:50,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:50,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:50,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:40:50,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:40:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:50,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838467528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:50,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:50,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:40:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057467170] [2021-07-09 18:40:50,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:40:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:40:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:40:50,819 INFO L87 Difference]: Start difference. First operand 1726 states and 5048 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:52,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:52,783 INFO L93 Difference]: Finished difference Result 2426 states and 6916 transitions. [2021-07-09 18:40:52,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:40:52,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:52,787 INFO L225 Difference]: With dead ends: 2426 [2021-07-09 18:40:52,787 INFO L226 Difference]: Without dead ends: 2411 [2021-07-09 18:40:52,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:40:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-07-09 18:40:52,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1738. [2021-07-09 18:40:52,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.929188255613126) internal successors, (5088), 1737 states have internal predecessors, (5088), 0 states have call successors, (0), 0 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 18:40:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 5088 transitions. [2021-07-09 18:40:52,810 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 5088 transitions. Word has length 33 [2021-07-09 18:40:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:52,810 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 5088 transitions. [2021-07-09 18:40:52,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 5088 transitions. [2021-07-09 18:40:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:52,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:52,812 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] [2021-07-09 18:40:53,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:40:53,013 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:53,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1738938016, now seen corresponding path program 27 times [2021-07-09 18:40:53,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:53,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599179175] [2021-07-09 18:40:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:53,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:53,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599179175] [2021-07-09 18:40:53,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599179175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:53,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853855580] [2021-07-09 18:40:53,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:40:53,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:40:53,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:53,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:53,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:53,400 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 5 treesize of output 3 [2021-07-09 18:40:53,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:53,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:53,410 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 18:40:53,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:40:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:53,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853855580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:53,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:53,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:40:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650134859] [2021-07-09 18:40:53,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:40:53,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:40:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:40:53,547 INFO L87 Difference]: Start difference. First operand 1738 states and 5088 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:55,149 INFO L93 Difference]: Finished difference Result 2450 states and 7097 transitions. [2021-07-09 18:40:55,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:40:55,149 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:55,153 INFO L225 Difference]: With dead ends: 2450 [2021-07-09 18:40:55,153 INFO L226 Difference]: Without dead ends: 2431 [2021-07-09 18:40:55,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1291.5ms TimeCoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:40:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2021-07-09 18:40:55,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 1734. [2021-07-09 18:40:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.9267166762839008) internal successors, (5072), 1733 states have internal predecessors, (5072), 0 states have call successors, (0), 0 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 18:40:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5072 transitions. [2021-07-09 18:40:55,177 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5072 transitions. Word has length 33 [2021-07-09 18:40:55,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:55,177 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 5072 transitions. [2021-07-09 18:40:55,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:40:55,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5072 transitions. [2021-07-09 18:40:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:55,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:55,179 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] [2021-07-09 18:40:55,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:55,382 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1880653156, now seen corresponding path program 28 times [2021-07-09 18:40:55,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:55,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318288389] [2021-07-09 18:40:55,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:55,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318288389] [2021-07-09 18:40:55,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318288389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95961283] [2021-07-09 18:40:55,639 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 18:40:55,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:40:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95961283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:55,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:40:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672554507] [2021-07-09 18:40:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:40:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:55,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:40:55,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:40:55,953 INFO L87 Difference]: Start difference. First operand 1734 states and 5072 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:40:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,334 INFO L93 Difference]: Finished difference Result 3027 states and 8657 transitions. [2021-07-09 18:40:57,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:40:57,335 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:57,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,339 INFO L225 Difference]: With dead ends: 3027 [2021-07-09 18:40:57,339 INFO L226 Difference]: Without dead ends: 3012 [2021-07-09 18:40:57,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1216.3ms TimeCoverageRelationStatistics Valid=327, Invalid=2325, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:40:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-07-09 18:40:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 1730. [2021-07-09 18:40:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 2.926547137073453) internal successors, (5060), 1729 states have internal predecessors, (5060), 0 states have call successors, (0), 0 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 18:40:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5060 transitions. [2021-07-09 18:40:57,368 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5060 transitions. Word has length 33 [2021-07-09 18:40:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,368 INFO L482 AbstractCegarLoop]: Abstraction has 1730 states and 5060 transitions. [2021-07-09 18:40:57,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:40:57,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5060 transitions. [2021-07-09 18:40:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:57,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,371 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] [2021-07-09 18:40:57,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,583 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,583 INFO L82 PathProgramCache]: Analyzing trace with hash 597505696, now seen corresponding path program 29 times [2021-07-09 18:40:57,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089631694] [2021-07-09 18:40:57,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089631694] [2021-07-09 18:40:57,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089631694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454578661] [2021-07-09 18:40:57,793 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 18:40:57,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:57,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:40:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454578661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:58,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:40:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807596621] [2021-07-09 18:40:58,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:40:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:40:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:40:58,090 INFO L87 Difference]: Start difference. First operand 1730 states and 5060 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:40:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:59,416 INFO L93 Difference]: Finished difference Result 3089 states and 8805 transitions. [2021-07-09 18:40:59,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:40:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:40:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:59,421 INFO L225 Difference]: With dead ends: 3089 [2021-07-09 18:40:59,421 INFO L226 Difference]: Without dead ends: 3074 [2021-07-09 18:40:59,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=301, Invalid=2149, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:40:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-07-09 18:40:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 1710. [2021-07-09 18:40:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 2.925687536571094) internal successors, (5000), 1709 states have internal predecessors, (5000), 0 states have call successors, (0), 0 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 18:40:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5000 transitions. [2021-07-09 18:40:59,447 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5000 transitions. Word has length 33 [2021-07-09 18:40:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:59,447 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5000 transitions. [2021-07-09 18:40:59,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 18:40:59,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5000 transitions. [2021-07-09 18:40:59,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:40:59,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:59,450 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] [2021-07-09 18:40:59,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 18:40:59,650 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:59,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:59,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1006494086, now seen corresponding path program 30 times [2021-07-09 18:40:59,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:59,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542599819] [2021-07-09 18:40:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:59,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542599819] [2021-07-09 18:40:59,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542599819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:59,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318746748] [2021-07-09 18:40:59,855 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 18:40:59,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:40:59,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:59,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:40:59,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:00,044 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 5 treesize of output 3 [2021-07-09 18:41:00,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:00,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:00,058 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 18:41:00,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-07-09 18:41:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318746748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:41:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101969583] [2021-07-09 18:41:00,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:41:00,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:00,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:41:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:00,165 INFO L87 Difference]: Start difference. First operand 1710 states and 5000 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:01,544 INFO L93 Difference]: Finished difference Result 3178 states and 9047 transitions. [2021-07-09 18:41:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:41:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:01,549 INFO L225 Difference]: With dead ends: 3178 [2021-07-09 18:41:01,549 INFO L226 Difference]: Without dead ends: 3163 [2021-07-09 18:41:01,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1141.8ms TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:41:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-07-09 18:41:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 1731. [2021-07-09 18:41:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.921387283236994) internal successors, (5054), 1730 states have internal predecessors, (5054), 0 states have call successors, (0), 0 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 18:41:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 5054 transitions. [2021-07-09 18:41:01,575 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 5054 transitions. Word has length 33 [2021-07-09 18:41:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:01,575 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 5054 transitions. [2021-07-09 18:41:01,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 5054 transitions. [2021-07-09 18:41:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:01,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:01,577 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] [2021-07-09 18:41:01,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:01,785 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1116574394, now seen corresponding path program 31 times [2021-07-09 18:41:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:01,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722693171] [2021-07-09 18:41:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:01,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:01,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722693171] [2021-07-09 18:41:01,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722693171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:01,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164155074] [2021-07-09 18:41:01,998 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) [2021-07-09 18:41:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:02,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164155074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:02,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:02,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-07-09 18:41:02,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520647807] [2021-07-09 18:41:02,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:41:02,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:41:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:02,287 INFO L87 Difference]: Start difference. First operand 1731 states and 5054 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:03,922 INFO L93 Difference]: Finished difference Result 4067 states and 11353 transitions. [2021-07-09 18:41:03,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:41:03,922 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:03,928 INFO L225 Difference]: With dead ends: 4067 [2021-07-09 18:41:03,928 INFO L226 Difference]: Without dead ends: 4037 [2021-07-09 18:41:03,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1353.0ms TimeCoverageRelationStatistics Valid=366, Invalid=2604, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:41:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-07-09 18:41:03,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 1768. [2021-07-09 18:41:03,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 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 18:41:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-07-09 18:41:03,961 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-07-09 18:41:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:03,961 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-07-09 18:41:03,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-07-09 18:41:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:03,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:03,964 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] [2021-07-09 18:41:04,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:41:04,173 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1818150758, now seen corresponding path program 32 times [2021-07-09 18:41:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344903116] [2021-07-09 18:41:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:04,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344903116] [2021-07-09 18:41:04,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344903116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075722563] [2021-07-09 18:41:04,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:41:04,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:04,581 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 5 treesize of output 3 [2021-07-09 18:41:04,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:04,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:04,589 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 18:41:04,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:41:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075722563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:04,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:41:04,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15214916] [2021-07-09 18:41:04,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:41:04,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:04,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:41:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:04,690 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:06,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:06,256 INFO L93 Difference]: Finished difference Result 3380 states and 9565 transitions. [2021-07-09 18:41:06,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:41:06,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:06,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:06,261 INFO L225 Difference]: With dead ends: 3380 [2021-07-09 18:41:06,261 INFO L226 Difference]: Without dead ends: 3365 [2021-07-09 18:41:06,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1251.9ms TimeCoverageRelationStatistics Valid=306, Invalid=2450, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:41:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-07-09 18:41:06,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 1852. [2021-07-09 18:41:06,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.902215018908698) internal successors, (5372), 1851 states have internal predecessors, (5372), 0 states have call successors, (0), 0 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 18:41:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5372 transitions. [2021-07-09 18:41:06,291 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5372 transitions. Word has length 33 [2021-07-09 18:41:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:06,291 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 5372 transitions. [2021-07-09 18:41:06,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5372 transitions. [2021-07-09 18:41:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:06,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:06,294 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] [2021-07-09 18:41:06,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:41:06,509 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1975675694, now seen corresponding path program 33 times [2021-07-09 18:41:06,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:06,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789113206] [2021-07-09 18:41:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789113206] [2021-07-09 18:41:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789113206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20777439] [2021-07-09 18:41:06,777 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 18:41:06,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:06,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:06,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:06,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:06,946 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 5 treesize of output 3 [2021-07-09 18:41:06,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:06,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:06,955 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 18:41:06,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:41:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20777439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:07,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:41:07,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129457310] [2021-07-09 18:41:07,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:41:07,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:41:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:07,115 INFO L87 Difference]: Start difference. First operand 1852 states and 5372 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:09,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:09,430 INFO L93 Difference]: Finished difference Result 3776 states and 10567 transitions. [2021-07-09 18:41:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:41:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:09,436 INFO L225 Difference]: With dead ends: 3776 [2021-07-09 18:41:09,436 INFO L226 Difference]: Without dead ends: 3746 [2021-07-09 18:41:09,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1885.0ms TimeCoverageRelationStatistics Valid=373, Invalid=3287, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:41:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-07-09 18:41:09,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 1915. [2021-07-09 18:41:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9054336468129573) internal successors, (5561), 1914 states have internal predecessors, (5561), 0 states have call successors, (0), 0 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 18:41:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5561 transitions. [2021-07-09 18:41:09,466 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5561 transitions. Word has length 33 [2021-07-09 18:41:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:09,466 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5561 transitions. [2021-07-09 18:41:09,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5561 transitions. [2021-07-09 18:41:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:09,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:09,469 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] [2021-07-09 18:41:09,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:41:09,670 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:09,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:09,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1746916850, now seen corresponding path program 34 times [2021-07-09 18:41:09,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:09,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940972477] [2021-07-09 18:41:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:09,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940972477] [2021-07-09 18:41:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940972477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341689895] [2021-07-09 18:41:09,928 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 18:41:09,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:09,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341689895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:10,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:41:10,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346699083] [2021-07-09 18:41:10,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:41:10,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:10,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:41:10,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:10,188 INFO L87 Difference]: Start difference. First operand 1915 states and 5561 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:11,432 INFO L93 Difference]: Finished difference Result 3286 states and 9167 transitions. [2021-07-09 18:41:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:41:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:11,437 INFO L225 Difference]: With dead ends: 3286 [2021-07-09 18:41:11,437 INFO L226 Difference]: Without dead ends: 3256 [2021-07-09 18:41:11,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:41:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-07-09 18:41:11,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1894. [2021-07-09 18:41:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 2.8969889064976226) internal successors, (5484), 1893 states have internal predecessors, (5484), 0 states have call successors, (0), 0 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 18:41:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 5484 transitions. [2021-07-09 18:41:11,466 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 5484 transitions. Word has length 33 [2021-07-09 18:41:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:11,466 INFO L482 AbstractCegarLoop]: Abstraction has 1894 states and 5484 transitions. [2021-07-09 18:41:11,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 5484 transitions. [2021-07-09 18:41:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:11,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:11,468 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] [2021-07-09 18:41:11,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:41:11,669 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash 800185050, now seen corresponding path program 35 times [2021-07-09 18:41:11,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:11,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731554584] [2021-07-09 18:41:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:11,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731554584] [2021-07-09 18:41:11,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731554584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649823670] [2021-07-09 18:41:11,895 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 18:41:11,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649823670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:41:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103231721] [2021-07-09 18:41:12,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:41:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:41:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:12,172 INFO L87 Difference]: Start difference. First operand 1894 states and 5484 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:14,121 INFO L93 Difference]: Finished difference Result 3610 states and 10178 transitions. [2021-07-09 18:41:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:41:14,121 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:14,126 INFO L225 Difference]: With dead ends: 3610 [2021-07-09 18:41:14,126 INFO L226 Difference]: Without dead ends: 3580 [2021-07-09 18:41:14,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 1507.9ms TimeCoverageRelationStatistics Valid=389, Invalid=2917, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:41:14,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2021-07-09 18:41:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 1873. [2021-07-09 18:41:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 2.8995726495726495) internal successors, (5428), 1872 states have internal predecessors, (5428), 0 states have call successors, (0), 0 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 18:41:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 5428 transitions. [2021-07-09 18:41:14,152 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 5428 transitions. Word has length 33 [2021-07-09 18:41:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:14,152 INFO L482 AbstractCegarLoop]: Abstraction has 1873 states and 5428 transitions. [2021-07-09 18:41:14,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 5428 transitions. [2021-07-09 18:41:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:14,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:14,154 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] [2021-07-09 18:41:14,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:41:14,355 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 645747532, now seen corresponding path program 36 times [2021-07-09 18:41:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:14,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943744421] [2021-07-09 18:41:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:14,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943744421] [2021-07-09 18:41:14,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943744421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263031359] [2021-07-09 18:41:14,596 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 18:41:14,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:14,741 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 5 treesize of output 3 [2021-07-09 18:41:14,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:14,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:14,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:14,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-07-09 18:41:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263031359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:14,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-07-09 18:41:14,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642616124] [2021-07-09 18:41:14,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:41:14,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:41:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:14,883 INFO L87 Difference]: Start difference. First operand 1873 states and 5428 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:16,814 INFO L93 Difference]: Finished difference Result 3372 states and 9542 transitions. [2021-07-09 18:41:16,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:41:16,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:16,820 INFO L225 Difference]: With dead ends: 3372 [2021-07-09 18:41:16,820 INFO L226 Difference]: Without dead ends: 3342 [2021-07-09 18:41:16,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1523.9ms TimeCoverageRelationStatistics Valid=333, Invalid=2859, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:41:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-07-09 18:41:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 1768. [2021-07-09 18:41:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 2.9134125636672326) internal successors, (5148), 1767 states have internal predecessors, (5148), 0 states have call successors, (0), 0 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 18:41:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5148 transitions. [2021-07-09 18:41:16,845 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5148 transitions. Word has length 33 [2021-07-09 18:41:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:16,845 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 5148 transitions. [2021-07-09 18:41:16,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5148 transitions. [2021-07-09 18:41:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:16,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:16,847 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] [2021-07-09 18:41:17,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:41:17,049 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash -415092510, now seen corresponding path program 37 times [2021-07-09 18:41:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:17,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594340534] [2021-07-09 18:41:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:17,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594340534] [2021-07-09 18:41:17,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594340534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:17,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603261579] [2021-07-09 18:41:17,178 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 18:41:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:17,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:17,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603261579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:17,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:17,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:17,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035115720] [2021-07-09 18:41:17,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:17,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:17,419 INFO L87 Difference]: Start difference. First operand 1768 states and 5148 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:17,885 INFO L93 Difference]: Finished difference Result 2915 states and 8366 transitions. [2021-07-09 18:41:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:17,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:17,890 INFO L225 Difference]: With dead ends: 2915 [2021-07-09 18:41:17,890 INFO L226 Difference]: Without dead ends: 2900 [2021-07-09 18:41:17,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-07-09 18:41:17,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 1844. [2021-07-09 18:41:17,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 2.921323928377645) internal successors, (5384), 1843 states have internal predecessors, (5384), 0 states have call successors, (0), 0 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 18:41:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 5384 transitions. [2021-07-09 18:41:17,916 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 5384 transitions. Word has length 33 [2021-07-09 18:41:17,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:17,916 INFO L482 AbstractCegarLoop]: Abstraction has 1844 states and 5384 transitions. [2021-07-09 18:41:17,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:17,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 5384 transitions. [2021-07-09 18:41:17,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:17,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:17,918 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] [2021-07-09 18:41:18,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:41:18,119 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash -307642142, now seen corresponding path program 38 times [2021-07-09 18:41:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:18,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344021934] [2021-07-09 18:41:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:18,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344021934] [2021-07-09 18:41:18,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344021934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837433464] [2021-07-09 18:41:18,264 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 18:41:18,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:18,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:18,415 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 5 treesize of output 3 [2021-07-09 18:41:18,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:18,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:18,425 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 18:41:18,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:41:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837433464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:18,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115543800] [2021-07-09 18:41:18,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:18,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:18,559 INFO L87 Difference]: Start difference. First operand 1844 states and 5384 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:19,385 INFO L93 Difference]: Finished difference Result 2512 states and 7162 transitions. [2021-07-09 18:41:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:41:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:19,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:19,389 INFO L225 Difference]: With dead ends: 2512 [2021-07-09 18:41:19,389 INFO L226 Difference]: Without dead ends: 2497 [2021-07-09 18:41:19,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:41:19,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-07-09 18:41:19,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1856. [2021-07-09 18:41:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.923989218328841) internal successors, (5424), 1855 states have internal predecessors, (5424), 0 states have call successors, (0), 0 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 18:41:19,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5424 transitions. [2021-07-09 18:41:19,413 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5424 transitions. Word has length 33 [2021-07-09 18:41:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:19,413 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5424 transitions. [2021-07-09 18:41:19,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5424 transitions. [2021-07-09 18:41:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:19,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:19,415 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] [2021-07-09 18:41:19,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:19,616 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:19,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1183824606, now seen corresponding path program 39 times [2021-07-09 18:41:19,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:19,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590545524] [2021-07-09 18:41:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:19,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590545524] [2021-07-09 18:41:19,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590545524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149326459] [2021-07-09 18:41:19,748 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 18:41:19,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:19,887 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 5 treesize of output 3 [2021-07-09 18:41:19,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:19,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:19,895 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 18:41:19,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:41:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:20,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149326459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:20,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:20,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140553978] [2021-07-09 18:41:20,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:20,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:20,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:20,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:20,015 INFO L87 Difference]: Start difference. First operand 1856 states and 5424 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:20,585 INFO L93 Difference]: Finished difference Result 2789 states and 8006 transitions. [2021-07-09 18:41:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:20,589 INFO L225 Difference]: With dead ends: 2789 [2021-07-09 18:41:20,589 INFO L226 Difference]: Without dead ends: 2770 [2021-07-09 18:41:20,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2021-07-09 18:41:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 1852. [2021-07-09 18:41:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 2.921663965424095) internal successors, (5408), 1851 states have internal predecessors, (5408), 0 states have call successors, (0), 0 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 18:41:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 5408 transitions. [2021-07-09 18:41:20,613 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 5408 transitions. Word has length 33 [2021-07-09 18:41:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:20,613 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 5408 transitions. [2021-07-09 18:41:20,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 5408 transitions. [2021-07-09 18:41:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:20,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:20,615 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] [2021-07-09 18:41:20,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:20,816 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:20,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:20,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1042109466, now seen corresponding path program 40 times [2021-07-09 18:41:20,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:20,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613891190] [2021-07-09 18:41:20,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:20,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613891190] [2021-07-09 18:41:20,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613891190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658598049] [2021-07-09 18:41:20,965 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 18:41:21,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:21,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658598049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:21,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:21,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132884303] [2021-07-09 18:41:21,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:21,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:21,189 INFO L87 Difference]: Start difference. First operand 1852 states and 5408 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:21,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:21,834 INFO L93 Difference]: Finished difference Result 3085 states and 8828 transitions. [2021-07-09 18:41:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:21,838 INFO L225 Difference]: With dead ends: 3085 [2021-07-09 18:41:21,838 INFO L226 Difference]: Without dead ends: 3070 [2021-07-09 18:41:21,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-07-09 18:41:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1867. [2021-07-09 18:41:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 2.9217577706323685) internal successors, (5452), 1866 states have internal predecessors, (5452), 0 states have call successors, (0), 0 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 18:41:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 5452 transitions. [2021-07-09 18:41:21,863 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 5452 transitions. Word has length 33 [2021-07-09 18:41:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:21,863 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 5452 transitions. [2021-07-09 18:41:21,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 5452 transitions. [2021-07-09 18:41:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:21,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:21,865 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] [2021-07-09 18:41:22,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:22,066 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1969710370, now seen corresponding path program 41 times [2021-07-09 18:41:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:22,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177801635] [2021-07-09 18:41:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:22,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177801635] [2021-07-09 18:41:22,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177801635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972814320] [2021-07-09 18:41:22,196 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 18:41:22,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:22,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972814320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:22,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83142071] [2021-07-09 18:41:22,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:22,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:22,395 INFO L87 Difference]: Start difference. First operand 1867 states and 5452 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:23,092 INFO L93 Difference]: Finished difference Result 3084 states and 8813 transitions. [2021-07-09 18:41:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:23,097 INFO L225 Difference]: With dead ends: 3084 [2021-07-09 18:41:23,097 INFO L226 Difference]: Without dead ends: 3069 [2021-07-09 18:41:23,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 547.1ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:41:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-07-09 18:41:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1847. [2021-07-09 18:41:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1846 states have (on average 2.9209100758396533) internal successors, (5392), 1846 states have internal predecessors, (5392), 0 states have call successors, (0), 0 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 18:41:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 5392 transitions. [2021-07-09 18:41:23,129 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 5392 transitions. Word has length 33 [2021-07-09 18:41:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:23,129 INFO L482 AbstractCegarLoop]: Abstraction has 1847 states and 5392 transitions. [2021-07-09 18:41:23,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 5392 transitions. [2021-07-09 18:41:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:23,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:23,132 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] [2021-07-09 18:41:23,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:41:23,332 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash -662650116, now seen corresponding path program 42 times [2021-07-09 18:41:23,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:23,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328795433] [2021-07-09 18:41:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:23,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:23,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328795433] [2021-07-09 18:41:23,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328795433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996812598] [2021-07-09 18:41:23,462 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 18:41:23,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:23,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996812598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:23,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:23,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004785493] [2021-07-09 18:41:23,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:23,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:23,704 INFO L87 Difference]: Start difference. First operand 1847 states and 5392 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:24,124 INFO L93 Difference]: Finished difference Result 2961 states and 8504 transitions. [2021-07-09 18:41:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:24,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:24,129 INFO L225 Difference]: With dead ends: 2961 [2021-07-09 18:41:24,129 INFO L226 Difference]: Without dead ends: 2946 [2021-07-09 18:41:24,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2946 states. [2021-07-09 18:41:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2946 to 1931. [2021-07-09 18:41:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.9098445595854923) internal successors, (5616), 1930 states have internal predecessors, (5616), 0 states have call successors, (0), 0 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 18:41:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5616 transitions. [2021-07-09 18:41:24,155 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5616 transitions. Word has length 33 [2021-07-09 18:41:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:24,156 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5616 transitions. [2021-07-09 18:41:24,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5616 transitions. [2021-07-09 18:41:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:24,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:24,158 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] [2021-07-09 18:41:24,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:24,358 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash -636581240, now seen corresponding path program 43 times [2021-07-09 18:41:24,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:24,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144612442] [2021-07-09 18:41:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:24,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144612442] [2021-07-09 18:41:24,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144612442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527027435] [2021-07-09 18:41:24,491 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 18:41:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:24,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527027435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:24,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:24,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411773272] [2021-07-09 18:41:24,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:24,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:24,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:24,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:24,736 INFO L87 Difference]: Start difference. First operand 1931 states and 5616 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:25,524 INFO L93 Difference]: Finished difference Result 2621 states and 7460 transitions. [2021-07-09 18:41:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:25,526 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:25,530 INFO L225 Difference]: With dead ends: 2621 [2021-07-09 18:41:25,530 INFO L226 Difference]: Without dead ends: 2606 [2021-07-09 18:41:25,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-07-09 18:41:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1994. [2021-07-09 18:41:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.912694430506774) internal successors, (5805), 1993 states have internal predecessors, (5805), 0 states have call successors, (0), 0 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 18:41:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5805 transitions. [2021-07-09 18:41:25,555 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5805 transitions. Word has length 33 [2021-07-09 18:41:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:25,556 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 5805 transitions. [2021-07-09 18:41:25,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5805 transitions. [2021-07-09 18:41:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:25,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:25,558 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] [2021-07-09 18:41:25,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:25,759 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -865340084, now seen corresponding path program 44 times [2021-07-09 18:41:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:25,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247523895] [2021-07-09 18:41:25,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:25,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247523895] [2021-07-09 18:41:25,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247523895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883040469] [2021-07-09 18:41:25,892 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 18:41:25,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:26,035 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 5 treesize of output 3 [2021-07-09 18:41:26,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:26,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:26,043 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 18:41:26,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:26,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883040469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:26,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:26,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:26,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825717573] [2021-07-09 18:41:26,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:26,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:26,155 INFO L87 Difference]: Start difference. First operand 1994 states and 5805 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:26,629 INFO L93 Difference]: Finished difference Result 2898 states and 8304 transitions. [2021-07-09 18:41:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:26,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:26,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:26,633 INFO L225 Difference]: With dead ends: 2898 [2021-07-09 18:41:26,633 INFO L226 Difference]: Without dead ends: 2883 [2021-07-09 18:41:26,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 523.5ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:26,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-07-09 18:41:26,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 1973. [2021-07-09 18:41:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 2.9046653144016226) internal successors, (5728), 1972 states have internal predecessors, (5728), 0 states have call successors, (0), 0 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 18:41:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 5728 transitions. [2021-07-09 18:41:26,659 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 5728 transitions. Word has length 33 [2021-07-09 18:41:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:26,659 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 5728 transitions. [2021-07-09 18:41:26,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 5728 transitions. [2021-07-09 18:41:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:26,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:26,661 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] [2021-07-09 18:41:26,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 18:41:26,862 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1812071884, now seen corresponding path program 45 times [2021-07-09 18:41:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:26,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184428248] [2021-07-09 18:41:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:26,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184428248] [2021-07-09 18:41:26,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184428248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:26,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912699417] [2021-07-09 18:41:26,995 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 18:41:27,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:27,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:27,151 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 5 treesize of output 3 [2021-07-09 18:41:27,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:27,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:27,159 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 18:41:27,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912699417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:27,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804426973] [2021-07-09 18:41:27,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:27,269 INFO L87 Difference]: Start difference. First operand 1973 states and 5728 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:27,811 INFO L93 Difference]: Finished difference Result 3145 states and 8991 transitions. [2021-07-09 18:41:27,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:27,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:27,817 INFO L225 Difference]: With dead ends: 3145 [2021-07-09 18:41:27,817 INFO L226 Difference]: Without dead ends: 3130 [2021-07-09 18:41:27,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 535.3ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:41:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2021-07-09 18:41:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 1994. [2021-07-09 18:41:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 2.902157551430005) internal successors, (5784), 1993 states have internal predecessors, (5784), 0 states have call successors, (0), 0 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 18:41:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 5784 transitions. [2021-07-09 18:41:27,844 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 5784 transitions. Word has length 33 [2021-07-09 18:41:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:27,844 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 5784 transitions. [2021-07-09 18:41:27,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 5784 transitions. [2021-07-09 18:41:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:27,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:27,846 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] [2021-07-09 18:41:28,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:41:28,047 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:28,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1966509402, now seen corresponding path program 46 times [2021-07-09 18:41:28,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:28,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464603795] [2021-07-09 18:41:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:28,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:28,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464603795] [2021-07-09 18:41:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464603795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:28,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167739731] [2021-07-09 18:41:28,194 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 18:41:28,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:28,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:28,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:28,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:28,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167739731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:28,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:28,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:28,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60750655] [2021-07-09 18:41:28,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:28,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:28,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:28,408 INFO L87 Difference]: Start difference. First operand 1994 states and 5784 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:28,895 INFO L93 Difference]: Finished difference Result 3024 states and 8672 transitions. [2021-07-09 18:41:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:28,899 INFO L225 Difference]: With dead ends: 3024 [2021-07-09 18:41:28,900 INFO L226 Difference]: Without dead ends: 3009 [2021-07-09 18:41:28,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-07-09 18:41:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1889. [2021-07-09 18:41:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 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 18:41:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-07-09 18:41:28,925 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-07-09 18:41:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:28,925 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-07-09 18:41:28,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-07-09 18:41:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:28,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:28,927 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] [2021-07-09 18:41:29,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:41:29,128 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:29,128 INFO L82 PathProgramCache]: Analyzing trace with hash 805070524, now seen corresponding path program 47 times [2021-07-09 18:41:29,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:29,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835917394] [2021-07-09 18:41:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:29,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835917394] [2021-07-09 18:41:29,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835917394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449855217] [2021-07-09 18:41:29,268 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 18:41:29,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:29,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:29,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449855217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:29,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:29,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571746696] [2021-07-09 18:41:29,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:29,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:29,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:29,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:29,512 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:30,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:30,371 INFO L93 Difference]: Finished difference Result 2385 states and 6869 transitions. [2021-07-09 18:41:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:30,375 INFO L225 Difference]: With dead ends: 2385 [2021-07-09 18:41:30,375 INFO L226 Difference]: Without dead ends: 2370 [2021-07-09 18:41:30,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-07-09 18:41:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 1915. [2021-07-09 18:41:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 2.9231974921630095) internal successors, (5595), 1914 states have internal predecessors, (5595), 0 states have call successors, (0), 0 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 18:41:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 5595 transitions. [2021-07-09 18:41:30,397 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 5595 transitions. Word has length 33 [2021-07-09 18:41:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:30,397 INFO L482 AbstractCegarLoop]: Abstraction has 1915 states and 5595 transitions. [2021-07-09 18:41:30,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 5595 transitions. [2021-07-09 18:41:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:30,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:30,399 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] [2021-07-09 18:41:30,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:30,608 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash -71111940, now seen corresponding path program 48 times [2021-07-09 18:41:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:30,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555137179] [2021-07-09 18:41:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:30,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555137179] [2021-07-09 18:41:30,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555137179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239914842] [2021-07-09 18:41:30,734 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 18:41:30,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:30,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:30,844 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 5 treesize of output 3 [2021-07-09 18:41:30,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:30,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:30,851 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 18:41:30,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239914842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:30,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459408436] [2021-07-09 18:41:30,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:30,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:30,992 INFO L87 Difference]: Start difference. First operand 1915 states and 5595 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:31,767 INFO L93 Difference]: Finished difference Result 2413 states and 6928 transitions. [2021-07-09 18:41:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:31,767 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:31,771 INFO L225 Difference]: With dead ends: 2413 [2021-07-09 18:41:31,771 INFO L226 Difference]: Without dead ends: 2394 [2021-07-09 18:41:31,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:41:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2021-07-09 18:41:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 1911. [2021-07-09 18:41:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 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 18:41:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-07-09 18:41:31,793 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-07-09 18:41:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:31,793 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-07-09 18:41:31,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-07-09 18:41:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:31,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:31,795 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] [2021-07-09 18:41:31,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:31,996 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1172935420, now seen corresponding path program 49 times [2021-07-09 18:41:31,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:31,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766239962] [2021-07-09 18:41:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:32,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:32,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766239962] [2021-07-09 18:41:32,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766239962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:32,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373922853] [2021-07-09 18:41:32,122 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 18:41:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373922853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:32,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:32,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:32,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864676188] [2021-07-09 18:41:32,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:32,375 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:33,232 INFO L93 Difference]: Finished difference Result 2450 states and 7029 transitions. [2021-07-09 18:41:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:33,236 INFO L225 Difference]: With dead ends: 2450 [2021-07-09 18:41:33,236 INFO L226 Difference]: Without dead ends: 2435 [2021-07-09 18:41:33,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-07-09 18:41:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1932. [2021-07-09 18:41:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 2.9290523045054377) internal successors, (5656), 1931 states have internal predecessors, (5656), 0 states have call successors, (0), 0 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 18:41:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 5656 transitions. [2021-07-09 18:41:33,259 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 5656 transitions. Word has length 33 [2021-07-09 18:41:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:33,259 INFO L482 AbstractCegarLoop]: Abstraction has 1932 states and 5656 transitions. [2021-07-09 18:41:33,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 5656 transitions. [2021-07-09 18:41:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:33,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:33,261 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] [2021-07-09 18:41:33,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:33,462 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1358361946, now seen corresponding path program 50 times [2021-07-09 18:41:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:33,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605202480] [2021-07-09 18:41:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605202480] [2021-07-09 18:41:33,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605202480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332048336] [2021-07-09 18:41:33,613 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 18:41:33,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:33,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:33,735 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 5 treesize of output 3 [2021-07-09 18:41:33,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:33,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:33,742 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 18:41:33,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332048336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:33,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:33,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965248708] [2021-07-09 18:41:33,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:33,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:33,884 INFO L87 Difference]: Start difference. First operand 1932 states and 5656 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:34,588 INFO L93 Difference]: Finished difference Result 2504 states and 7139 transitions. [2021-07-09 18:41:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:34,592 INFO L225 Difference]: With dead ends: 2504 [2021-07-09 18:41:34,592 INFO L226 Difference]: Without dead ends: 2489 [2021-07-09 18:41:34,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:41:34,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2021-07-09 18:41:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 1911. [2021-07-09 18:41:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 2.9209424083769635) internal successors, (5579), 1910 states have internal predecessors, (5579), 0 states have call successors, (0), 0 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 18:41:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 5579 transitions. [2021-07-09 18:41:34,618 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 5579 transitions. Word has length 33 [2021-07-09 18:41:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:34,618 INFO L482 AbstractCegarLoop]: Abstraction has 1911 states and 5579 transitions. [2021-07-09 18:41:34,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 5579 transitions. [2021-07-09 18:41:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:34,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:34,620 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] [2021-07-09 18:41:34,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:34,821 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:34,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1298065604, now seen corresponding path program 51 times [2021-07-09 18:41:34,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:34,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650829471] [2021-07-09 18:41:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:34,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650829471] [2021-07-09 18:41:34,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650829471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044644649] [2021-07-09 18:41:34,951 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 18:41:34,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:34,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:34,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 18:41:34,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:35,073 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 5 treesize of output 3 [2021-07-09 18:41:35,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:35,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:35,080 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 18:41:35,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044644649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:35,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:35,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806339579] [2021-07-09 18:41:35,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:35,219 INFO L87 Difference]: Start difference. First operand 1911 states and 5579 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:35,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:35,650 INFO L93 Difference]: Finished difference Result 2538 states and 7369 transitions. [2021-07-09 18:41:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:35,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:35,653 INFO L225 Difference]: With dead ends: 2538 [2021-07-09 18:41:35,653 INFO L226 Difference]: Without dead ends: 2519 [2021-07-09 18:41:35,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:41:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-07-09 18:41:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1933. [2021-07-09 18:41:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 2.9151138716356106) internal successors, (5632), 1932 states have internal predecessors, (5632), 0 states have call successors, (0), 0 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 18:41:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 5632 transitions. [2021-07-09 18:41:35,675 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 5632 transitions. Word has length 33 [2021-07-09 18:41:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:35,676 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 5632 transitions. [2021-07-09 18:41:35,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 5632 transitions. [2021-07-09 18:41:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:35,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:35,678 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] [2021-07-09 18:41:35,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 18:41:35,893 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1905503364, now seen corresponding path program 52 times [2021-07-09 18:41:35,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:35,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968165264] [2021-07-09 18:41:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:36,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968165264] [2021-07-09 18:41:36,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968165264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761945638] [2021-07-09 18:41:36,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:41:36,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:36,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761945638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:36,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:36,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62312110] [2021-07-09 18:41:36,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:36,225 INFO L87 Difference]: Start difference. First operand 1933 states and 5632 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:36,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:36,720 INFO L93 Difference]: Finished difference Result 2564 states and 7420 transitions. [2021-07-09 18:41:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:36,724 INFO L225 Difference]: With dead ends: 2564 [2021-07-09 18:41:36,724 INFO L226 Difference]: Without dead ends: 2549 [2021-07-09 18:41:36,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:41:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-07-09 18:41:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1900. [2021-07-09 18:41:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 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 18:41:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-07-09 18:41:36,747 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-07-09 18:41:36,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:36,747 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-07-09 18:41:36,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-07-09 18:41:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:36,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:36,750 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] [2021-07-09 18:41:36,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:36,951 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:36,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:36,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1368340592, now seen corresponding path program 53 times [2021-07-09 18:41:36,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:36,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815188665] [2021-07-09 18:41:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:37,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:37,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815188665] [2021-07-09 18:41:37,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815188665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426517452] [2021-07-09 18:41:37,092 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 18:41:37,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:37,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:37,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:37,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426517452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:37,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:37,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:37,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751265976] [2021-07-09 18:41:37,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:37,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:37,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:37,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:37,331 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:38,275 INFO L93 Difference]: Finished difference Result 2546 states and 7305 transitions. [2021-07-09 18:41:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:38,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:38,279 INFO L225 Difference]: With dead ends: 2546 [2021-07-09 18:41:38,279 INFO L226 Difference]: Without dead ends: 2531 [2021-07-09 18:41:38,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 880.7ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-07-09 18:41:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 1908. [2021-07-09 18:41:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.91767173571054) internal successors, (5564), 1907 states have internal predecessors, (5564), 0 states have call successors, (0), 0 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 18:41:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5564 transitions. [2021-07-09 18:41:38,301 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5564 transitions. Word has length 33 [2021-07-09 18:41:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:38,301 INFO L482 AbstractCegarLoop]: Abstraction has 1908 states and 5564 transitions. [2021-07-09 18:41:38,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5564 transitions. [2021-07-09 18:41:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:38,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:38,303 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] [2021-07-09 18:41:38,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:41:38,504 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2050444240, now seen corresponding path program 54 times [2021-07-09 18:41:38,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:38,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874013164] [2021-07-09 18:41:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874013164] [2021-07-09 18:41:38,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874013164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080385847] [2021-07-09 18:41:38,632 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 18:41:38,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:38,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:38,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:38,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:38,747 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 5 treesize of output 3 [2021-07-09 18:41:38,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:38,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:38,754 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 18:41:38,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080385847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:38,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427008201] [2021-07-09 18:41:38,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:38,914 INFO L87 Difference]: Start difference. First operand 1908 states and 5564 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:39,543 INFO L93 Difference]: Finished difference Result 2798 states and 8083 transitions. [2021-07-09 18:41:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:41:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:39,548 INFO L225 Difference]: With dead ends: 2798 [2021-07-09 18:41:39,548 INFO L226 Difference]: Without dead ends: 2779 [2021-07-09 18:41:39,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:41:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-07-09 18:41:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 1900. [2021-07-09 18:41:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9152185360716167) internal successors, (5536), 1899 states have internal predecessors, (5536), 0 states have call successors, (0), 0 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 18:41:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5536 transitions. [2021-07-09 18:41:39,573 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5536 transitions. Word has length 33 [2021-07-09 18:41:39,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:39,573 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5536 transitions. [2021-07-09 18:41:39,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:39,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5536 transitions. [2021-07-09 18:41:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:39,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:39,575 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] [2021-07-09 18:41:39,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:41:39,776 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash 770530304, now seen corresponding path program 55 times [2021-07-09 18:41:39,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:39,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248321353] [2021-07-09 18:41:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:39,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248321353] [2021-07-09 18:41:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248321353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636571215] [2021-07-09 18:41:39,910 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 18:41:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:39,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:39,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:40,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636571215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:40,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:40,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354065797] [2021-07-09 18:41:40,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:40,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:40,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:40,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:40,147 INFO L87 Difference]: Start difference. First operand 1900 states and 5536 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:41,141 INFO L93 Difference]: Finished difference Result 2680 states and 7637 transitions. [2021-07-09 18:41:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:41,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:41,146 INFO L225 Difference]: With dead ends: 2680 [2021-07-09 18:41:41,146 INFO L226 Difference]: Without dead ends: 2665 [2021-07-09 18:41:41,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 926.7ms TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-07-09 18:41:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 1942. [2021-07-09 18:41:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 2.9206594538897477) internal successors, (5669), 1941 states have internal predecessors, (5669), 0 states have call successors, (0), 0 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 18:41:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 5669 transitions. [2021-07-09 18:41:41,170 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 5669 transitions. Word has length 33 [2021-07-09 18:41:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:41,170 INFO L482 AbstractCegarLoop]: Abstraction has 1942 states and 5669 transitions. [2021-07-09 18:41:41,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 5669 transitions. [2021-07-09 18:41:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:41,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:41,172 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] [2021-07-09 18:41:41,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:41,389 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1760767062, now seen corresponding path program 56 times [2021-07-09 18:41:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:41,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835626216] [2021-07-09 18:41:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:41,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:41,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835626216] [2021-07-09 18:41:41,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835626216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:41,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894482454] [2021-07-09 18:41:41,517 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 18:41:41,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:41,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:41,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:41,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:41,627 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 5 treesize of output 3 [2021-07-09 18:41:41,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:41,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:41,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:41:41,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:41,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894482454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:41,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:41,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872570366] [2021-07-09 18:41:41,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:41,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:41,771 INFO L87 Difference]: Start difference. First operand 1942 states and 5669 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:42,434 INFO L93 Difference]: Finished difference Result 2932 states and 8415 transitions. [2021-07-09 18:41:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:41:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:42,438 INFO L225 Difference]: With dead ends: 2932 [2021-07-09 18:41:42,439 INFO L226 Difference]: Without dead ends: 2917 [2021-07-09 18:41:42,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:41:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-07-09 18:41:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 1889. [2021-07-09 18:41:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.9152542372881354) internal successors, (5504), 1888 states have internal predecessors, (5504), 0 states have call successors, (0), 0 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 18:41:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 5504 transitions. [2021-07-09 18:41:42,464 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 5504 transitions. Word has length 33 [2021-07-09 18:41:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:42,464 INFO L482 AbstractCegarLoop]: Abstraction has 1889 states and 5504 transitions. [2021-07-09 18:41:42,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 5504 transitions. [2021-07-09 18:41:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:42,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:42,466 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] [2021-07-09 18:41:42,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:41:42,682 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:42,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1988501982, now seen corresponding path program 57 times [2021-07-09 18:41:42,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:42,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420340685] [2021-07-09 18:41:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:42,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420340685] [2021-07-09 18:41:42,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420340685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722847970] [2021-07-09 18:41:42,813 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 18:41:42,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:42,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:42,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:42,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:42,927 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 5 treesize of output 3 [2021-07-09 18:41:42,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:42,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:42,935 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 18:41:42,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:43,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722847970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:43,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:43,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:43,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495970176] [2021-07-09 18:41:43,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:43,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:43,084 INFO L87 Difference]: Start difference. First operand 1889 states and 5504 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:44,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:44,231 INFO L93 Difference]: Finished difference Result 2623 states and 7490 transitions. [2021-07-09 18:41:44,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:41:44,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:44,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:44,235 INFO L225 Difference]: With dead ends: 2623 [2021-07-09 18:41:44,235 INFO L226 Difference]: Without dead ends: 2608 [2021-07-09 18:41:44,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:41:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-09 18:41:44,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1893. [2021-07-09 18:41:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.9175475687103596) internal successors, (5520), 1892 states have internal predecessors, (5520), 0 states have call successors, (0), 0 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 18:41:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 5520 transitions. [2021-07-09 18:41:44,258 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 5520 transitions. Word has length 33 [2021-07-09 18:41:44,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:44,258 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 5520 transitions. [2021-07-09 18:41:44,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:44,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 5520 transitions. [2021-07-09 18:41:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:44,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:44,260 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] [2021-07-09 18:41:44,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:44,461 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:44,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1112319518, now seen corresponding path program 58 times [2021-07-09 18:41:44,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:44,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294661246] [2021-07-09 18:41:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294661246] [2021-07-09 18:41:44,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294661246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638120282] [2021-07-09 18:41:44,592 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 18:41:44,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:44,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:44,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:44,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638120282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:44,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:44,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059953884] [2021-07-09 18:41:44,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:44,811 INFO L87 Difference]: Start difference. First operand 1893 states and 5520 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:45,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:45,505 INFO L93 Difference]: Finished difference Result 2900 states and 8334 transitions. [2021-07-09 18:41:45,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:45,505 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:45,509 INFO L225 Difference]: With dead ends: 2900 [2021-07-09 18:41:45,509 INFO L226 Difference]: Without dead ends: 2881 [2021-07-09 18:41:45,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-07-09 18:41:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 1881. [2021-07-09 18:41:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 2.9148936170212765) internal successors, (5480), 1880 states have internal predecessors, (5480), 0 states have call successors, (0), 0 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 18:41:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 5480 transitions. [2021-07-09 18:41:45,534 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 5480 transitions. Word has length 33 [2021-07-09 18:41:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:45,534 INFO L482 AbstractCegarLoop]: Abstraction has 1881 states and 5480 transitions. [2021-07-09 18:41:45,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 5480 transitions. [2021-07-09 18:41:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:45,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:45,536 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] [2021-07-09 18:41:45,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 18:41:45,737 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:45,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1313138884, now seen corresponding path program 59 times [2021-07-09 18:41:45,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:45,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020237549] [2021-07-09 18:41:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:45,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020237549] [2021-07-09 18:41:45,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020237549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:45,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916299600] [2021-07-09 18:41:45,874 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 18:41:45,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:45,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:45,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:45,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:46,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916299600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:46,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:46,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:46,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600856079] [2021-07-09 18:41:46,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:46,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:46,098 INFO L87 Difference]: Start difference. First operand 1881 states and 5480 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:46,978 INFO L93 Difference]: Finished difference Result 2510 states and 7169 transitions. [2021-07-09 18:41:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:41:46,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 33 [2021-07-09 18:41:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:46,982 INFO L225 Difference]: With dead ends: 2510 [2021-07-09 18:41:46,983 INFO L226 Difference]: Without dead ends: 2495 [2021-07-09 18:41:46,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-07-09 18:41:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 1902. [2021-07-09 18:41:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.923198316675434) internal successors, (5557), 1901 states have internal predecessors, (5557), 0 states have call successors, (0), 0 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 18:41:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5557 transitions. [2021-07-09 18:41:47,005 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5557 transitions. Word has length 33 [2021-07-09 18:41:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:47,005 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5557 transitions. [2021-07-09 18:41:47,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 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 18:41:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5557 transitions. [2021-07-09 18:41:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:47,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:47,007 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] [2021-07-09 18:41:47,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:47,221 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:47,221 INFO L82 PathProgramCache]: Analyzing trace with hash 450531046, now seen corresponding path program 60 times [2021-07-09 18:41:47,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:47,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496259075] [2021-07-09 18:41:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:47,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496259075] [2021-07-09 18:41:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496259075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566782114] [2021-07-09 18:41:47,359 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 18:41:47,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:47,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:47,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:47,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566782114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:47,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:47,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:47,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573355652] [2021-07-09 18:41:47,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:47,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:47,642 INFO L87 Difference]: Start difference. First operand 1902 states and 5557 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:48,285 INFO L93 Difference]: Finished difference Result 2848 states and 8175 transitions. [2021-07-09 18:41:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:41:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:48,290 INFO L225 Difference]: With dead ends: 2848 [2021-07-09 18:41:48,290 INFO L226 Difference]: Without dead ends: 2833 [2021-07-09 18:41:48,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:48,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-07-09 18:41:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1784. [2021-07-09 18:41:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 2.9209197980931014) internal successors, (5208), 1783 states have internal predecessors, (5208), 0 states have call successors, (0), 0 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 18:41:48,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5208 transitions. [2021-07-09 18:41:48,314 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5208 transitions. Word has length 33 [2021-07-09 18:41:48,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:48,314 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5208 transitions. [2021-07-09 18:41:48,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5208 transitions. [2021-07-09 18:41:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:48,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:48,317 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] [2021-07-09 18:41:48,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 18:41:48,532 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:48,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:48,532 INFO L82 PathProgramCache]: Analyzing trace with hash -663884432, now seen corresponding path program 61 times [2021-07-09 18:41:48,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:48,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923455720] [2021-07-09 18:41:48,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:48,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:48,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:48,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923455720] [2021-07-09 18:41:48,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923455720] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:41:48,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:41:48,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:41:48,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960841656] [2021-07-09 18:41:48,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:41:48,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:41:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:41:48,543 INFO L87 Difference]: Start difference. First operand 1784 states and 5208 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:41:48,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:48,549 INFO L93 Difference]: Finished difference Result 1474 states and 4216 transitions. [2021-07-09 18:41:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:41:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:48,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:48,551 INFO L225 Difference]: With dead ends: 1474 [2021-07-09 18:41:48,551 INFO L226 Difference]: Without dead ends: 1474 [2021-07-09 18:41:48,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:41:48,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-07-09 18:41:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1474. [2021-07-09 18:41:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.8621860149355056) internal successors, (4216), 1473 states have internal predecessors, (4216), 0 states have call successors, (0), 0 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 18:41:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 4216 transitions. [2021-07-09 18:41:48,567 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 4216 transitions. Word has length 33 [2021-07-09 18:41:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:48,567 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 4216 transitions. [2021-07-09 18:41:48,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 18:41:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 4216 transitions. [2021-07-09 18:41:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:48,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:48,569 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] [2021-07-09 18:41:48,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-07-09 18:41:48,569 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1631393534, now seen corresponding path program 62 times [2021-07-09 18:41:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699453046] [2021-07-09 18:41:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:48,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:48,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699453046] [2021-07-09 18:41:48,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699453046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:48,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337290947] [2021-07-09 18:41:48,707 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 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 18:41:48,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:48,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:48,862 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 5 treesize of output 3 [2021-07-09 18:41:48,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:48,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:48,869 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 18:41:48,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:41:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:48,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337290947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:48,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:48,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:48,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192335087] [2021-07-09 18:41:48,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:48,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:48,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:48,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:48,954 INFO L87 Difference]: Start difference. First operand 1474 states and 4216 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:49,392 INFO L93 Difference]: Finished difference Result 2467 states and 6892 transitions. [2021-07-09 18:41:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:49,396 INFO L225 Difference]: With dead ends: 2467 [2021-07-09 18:41:49,396 INFO L226 Difference]: Without dead ends: 2452 [2021-07-09 18:41:49,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 446.8ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:41:49,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-07-09 18:41:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1513. [2021-07-09 18:41:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.8624338624338623) internal successors, (4328), 1512 states have internal predecessors, (4328), 0 states have call successors, (0), 0 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 18:41:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4328 transitions. [2021-07-09 18:41:49,415 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4328 transitions. Word has length 33 [2021-07-09 18:41:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:49,415 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4328 transitions. [2021-07-09 18:41:49,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4328 transitions. [2021-07-09 18:41:49,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:49,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:49,417 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] [2021-07-09 18:41:49,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:49,618 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1738843902, now seen corresponding path program 63 times [2021-07-09 18:41:49,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:49,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310163146] [2021-07-09 18:41:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:49,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:49,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310163146] [2021-07-09 18:41:49,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310163146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:49,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674315195] [2021-07-09 18:41:49,759 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 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 18:41:49,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:49,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:49,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:49,908 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 5 treesize of output 3 [2021-07-09 18:41:49,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:49,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:49,917 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 18:41:49,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:41:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:50,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674315195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:50,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:50,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:50,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320781707] [2021-07-09 18:41:50,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:50,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:50,059 INFO L87 Difference]: Start difference. First operand 1513 states and 4328 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:50,862 INFO L93 Difference]: Finished difference Result 2081 states and 5793 transitions. [2021-07-09 18:41:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:50,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:50,865 INFO L225 Difference]: With dead ends: 2081 [2021-07-09 18:41:50,865 INFO L226 Difference]: Without dead ends: 2066 [2021-07-09 18:41:50,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-07-09 18:41:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1525. [2021-07-09 18:41:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 2.8661417322834644) internal successors, (4368), 1524 states have internal predecessors, (4368), 0 states have call successors, (0), 0 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 18:41:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 4368 transitions. [2021-07-09 18:41:50,883 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 4368 transitions. Word has length 33 [2021-07-09 18:41:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:50,883 INFO L482 AbstractCegarLoop]: Abstraction has 1525 states and 4368 transitions. [2021-07-09 18:41:50,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:50,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 4368 transitions. [2021-07-09 18:41:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:50,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:50,884 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] [2021-07-09 18:41:51,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:41:51,089 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash 862661438, now seen corresponding path program 64 times [2021-07-09 18:41:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:51,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229045030] [2021-07-09 18:41:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:51,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:51,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229045030] [2021-07-09 18:41:51,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229045030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:51,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470277393] [2021-07-09 18:41:51,227 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 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 18:41:51,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:51,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:51,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:51,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:51,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470277393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:51,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:51,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:41:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198224969] [2021-07-09 18:41:51,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:41:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:51,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:41:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:51,460 INFO L87 Difference]: Start difference. First operand 1525 states and 4368 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:52,016 INFO L93 Difference]: Finished difference Result 2367 states and 6619 transitions. [2021-07-09 18:41:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:41:52,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:52,020 INFO L225 Difference]: With dead ends: 2367 [2021-07-09 18:41:52,020 INFO L226 Difference]: Without dead ends: 2348 [2021-07-09 18:41:52,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-07-09 18:41:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1521. [2021-07-09 18:41:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.863157894736842) internal successors, (4352), 1520 states have internal predecessors, (4352), 0 states have call successors, (0), 0 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 18:41:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4352 transitions. [2021-07-09 18:41:52,038 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4352 transitions. Word has length 33 [2021-07-09 18:41:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:52,038 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4352 transitions. [2021-07-09 18:41:52,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4352 transitions. [2021-07-09 18:41:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:52,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:52,040 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] [2021-07-09 18:41:52,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:52,240 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1004376578, now seen corresponding path program 65 times [2021-07-09 18:41:52,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:52,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903306009] [2021-07-09 18:41:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:52,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903306009] [2021-07-09 18:41:52,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903306009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498151444] [2021-07-09 18:41:52,371 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 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 18:41:52,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:52,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:52,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:52,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:52,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498151444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:52,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:52,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:41:52,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169661983] [2021-07-09 18:41:52,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:41:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:41:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:52,627 INFO L87 Difference]: Start difference. First operand 1521 states and 4352 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:53,314 INFO L93 Difference]: Finished difference Result 2637 states and 7354 transitions. [2021-07-09 18:41:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:53,318 INFO L225 Difference]: With dead ends: 2637 [2021-07-09 18:41:53,318 INFO L226 Difference]: Without dead ends: 2622 [2021-07-09 18:41:53,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 581.9ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-07-09 18:41:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1527. [2021-07-09 18:41:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8636959370904327) internal successors, (4370), 1526 states have internal predecessors, (4370), 0 states have call successors, (0), 0 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 18:41:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4370 transitions. [2021-07-09 18:41:53,338 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4370 transitions. Word has length 33 [2021-07-09 18:41:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:53,338 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4370 transitions. [2021-07-09 18:41:53,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4370 transitions. [2021-07-09 18:41:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:53,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:53,340 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] [2021-07-09 18:41:53,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:41:53,541 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash -278770882, now seen corresponding path program 66 times [2021-07-09 18:41:53,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:53,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740360337] [2021-07-09 18:41:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:53,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:53,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:53,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740360337] [2021-07-09 18:41:53,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740360337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:53,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421440050] [2021-07-09 18:41:53,671 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 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 18:41:53,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:53,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:53,800 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 5 treesize of output 3 [2021-07-09 18:41:53,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:53,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:53,808 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 18:41:53,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:21 [2021-07-09 18:41:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421440050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:53,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:53,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:53,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338850368] [2021-07-09 18:41:53,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:53,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:53,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:53,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:53,918 INFO L87 Difference]: Start difference. First operand 1527 states and 4370 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:54,502 INFO L93 Difference]: Finished difference Result 2636 states and 7339 transitions. [2021-07-09 18:41:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:41:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:54,506 INFO L225 Difference]: With dead ends: 2636 [2021-07-09 18:41:54,506 INFO L226 Difference]: Without dead ends: 2621 [2021-07-09 18:41:54,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 507.0ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:41:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2021-07-09 18:41:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1507. [2021-07-09 18:41:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.861885790172643) internal successors, (4310), 1506 states have internal predecessors, (4310), 0 states have call successors, (0), 0 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 18:41:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4310 transitions. [2021-07-09 18:41:54,526 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4310 transitions. Word has length 33 [2021-07-09 18:41:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:54,526 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4310 transitions. [2021-07-09 18:41:54,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:54,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4310 transitions. [2021-07-09 18:41:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:54,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:54,527 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] [2021-07-09 18:41:54,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:41:54,728 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1383835928, now seen corresponding path program 67 times [2021-07-09 18:41:54,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:54,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580381237] [2021-07-09 18:41:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:54,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:54,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580381237] [2021-07-09 18:41:54,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580381237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:54,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341121186] [2021-07-09 18:41:54,861 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 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 18:41:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:55,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341121186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:55,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:55,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:41:55,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235513586] [2021-07-09 18:41:55,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:41:55,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:41:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:55,084 INFO L87 Difference]: Start difference. First operand 1507 states and 4310 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:55,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:55,573 INFO L93 Difference]: Finished difference Result 2483 states and 6920 transitions. [2021-07-09 18:41:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:55,573 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:55,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:55,576 INFO L225 Difference]: With dead ends: 2483 [2021-07-09 18:41:55,577 INFO L226 Difference]: Without dead ends: 2468 [2021-07-09 18:41:55,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:41:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2468 states. [2021-07-09 18:41:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2468 to 1576. [2021-07-09 18:41:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.843809523809524) internal successors, (4479), 1575 states have internal predecessors, (4479), 0 states have call successors, (0), 0 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 18:41:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 4479 transitions. [2021-07-09 18:41:55,596 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 4479 transitions. Word has length 33 [2021-07-09 18:41:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:55,596 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 4479 transitions. [2021-07-09 18:41:55,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 4479 transitions. [2021-07-09 18:41:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:55,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:55,598 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] [2021-07-09 18:41:55,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:41:55,798 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1409904804, now seen corresponding path program 68 times [2021-07-09 18:41:55,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:55,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058415942] [2021-07-09 18:41:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:55,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:55,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058415942] [2021-07-09 18:41:55,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058415942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:55,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406220086] [2021-07-09 18:41:55,924 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 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 18:41:55,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:41:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:56,057 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 5 treesize of output 3 [2021-07-09 18:41:56,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:56,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:56,065 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 18:41:56,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:23 [2021-07-09 18:41:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:56,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406220086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:56,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:56,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377172413] [2021-07-09 18:41:56,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:56,187 INFO L87 Difference]: Start difference. First operand 1576 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:56,932 INFO L93 Difference]: Finished difference Result 2059 states and 5724 transitions. [2021-07-09 18:41:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:56,935 INFO L225 Difference]: With dead ends: 2059 [2021-07-09 18:41:56,935 INFO L226 Difference]: Without dead ends: 2044 [2021-07-09 18:41:56,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-07-09 18:41:56,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1594. [2021-07-09 18:41:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.8455743879472695) internal successors, (4533), 1593 states have internal predecessors, (4533), 0 states have call successors, (0), 0 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 18:41:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4533 transitions. [2021-07-09 18:41:56,954 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4533 transitions. Word has length 33 [2021-07-09 18:41:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:56,954 INFO L482 AbstractCegarLoop]: Abstraction has 1594 states and 4533 transitions. [2021-07-09 18:41:56,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4533 transitions. [2021-07-09 18:41:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:56,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:56,956 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] [2021-07-09 18:41:57,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:57,157 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1181145960, now seen corresponding path program 69 times [2021-07-09 18:41:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:57,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576323268] [2021-07-09 18:41:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:57,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:57,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576323268] [2021-07-09 18:41:57,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576323268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:57,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923398810] [2021-07-09 18:41:57,289 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 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 18:41:57,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:57,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:41:57,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:57,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923398810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:57,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:57,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:41:57,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267186432] [2021-07-09 18:41:57,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:41:57,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:41:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:57,543 INFO L87 Difference]: Start difference. First operand 1594 states and 4533 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:58,034 INFO L93 Difference]: Finished difference Result 2345 states and 6550 transitions. [2021-07-09 18:41:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:58,034 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:58,038 INFO L225 Difference]: With dead ends: 2345 [2021-07-09 18:41:58,038 INFO L226 Difference]: Without dead ends: 2330 [2021-07-09 18:41:58,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:41:58,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-07-09 18:41:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1588. [2021-07-09 18:41:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.8424700693131695) internal successors, (4511), 1587 states have internal predecessors, (4511), 0 states have call successors, (0), 0 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 18:41:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4511 transitions. [2021-07-09 18:41:58,060 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4511 transitions. Word has length 33 [2021-07-09 18:41:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:58,060 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4511 transitions. [2021-07-09 18:41:58,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:41:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4511 transitions. [2021-07-09 18:41:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:58,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:58,062 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] [2021-07-09 18:41:58,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:58,262 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 234414160, now seen corresponding path program 70 times [2021-07-09 18:41:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:58,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241261357] [2021-07-09 18:41:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:58,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:58,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241261357] [2021-07-09 18:41:58,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241261357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523950299] [2021-07-09 18:41:58,396 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 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 18:41:58,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:58,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:58,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523950299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:58,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:58,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:41:58,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959256133] [2021-07-09 18:41:58,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:41:58,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:58,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:41:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:58,633 INFO L87 Difference]: Start difference. First operand 1588 states and 4511 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:59,169 INFO L93 Difference]: Finished difference Result 2502 states and 6967 transitions. [2021-07-09 18:41:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:41:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:59,173 INFO L225 Difference]: With dead ends: 2502 [2021-07-09 18:41:59,173 INFO L226 Difference]: Without dead ends: 2487 [2021-07-09 18:41:59,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 526.9ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:59,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-07-09 18:41:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1594. [2021-07-09 18:41:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.84180790960452) internal successors, (4527), 1593 states have internal predecessors, (4527), 0 states have call successors, (0), 0 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 18:41:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4527 transitions. [2021-07-09 18:41:59,193 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4527 transitions. Word has length 33 [2021-07-09 18:41:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:59,193 INFO L482 AbstractCegarLoop]: Abstraction has 1594 states and 4527 transitions. [2021-07-09 18:41:59,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:41:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4527 transitions. [2021-07-09 18:41:59,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:41:59,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:59,195 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] [2021-07-09 18:41:59,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:59,397 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash 79976642, now seen corresponding path program 71 times [2021-07-09 18:41:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:59,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62251565] [2021-07-09 18:41:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:59,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62251565] [2021-07-09 18:41:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62251565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:59,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114409434] [2021-07-09 18:41:59,543 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 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 18:41:59,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:59,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:59,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114409434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:59,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:59,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:41:59,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375898609] [2021-07-09 18:41:59,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:41:59,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:41:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:59,783 INFO L87 Difference]: Start difference. First operand 1594 states and 4527 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:00,294 INFO L93 Difference]: Finished difference Result 2501 states and 6968 transitions. [2021-07-09 18:42:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:42:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:00,299 INFO L225 Difference]: With dead ends: 2501 [2021-07-09 18:42:00,299 INFO L226 Difference]: Without dead ends: 2486 [2021-07-09 18:42:00,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:42:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-07-09 18:42:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1519. [2021-07-09 18:42:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 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 18:42:00,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-07-09 18:42:00,319 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-07-09 18:42:00,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:00,319 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-07-09 18:42:00,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-07-09 18:42:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:00,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:00,321 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] [2021-07-09 18:42:00,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 18:42:00,521 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1443410728, now seen corresponding path program 72 times [2021-07-09 18:42:00,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:00,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133562448] [2021-07-09 18:42:00,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:00,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:00,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133562448] [2021-07-09 18:42:00,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133562448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:00,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89875402] [2021-07-09 18:42:00,649 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 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 18:42:00,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:42:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:00,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:42:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:00,767 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 5 treesize of output 3 [2021-07-09 18:42:00,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:00,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:00,774 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 18:42:00,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:42:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89875402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:00,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:00,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982095707] [2021-07-09 18:42:00,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:00,928 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:01,664 INFO L93 Difference]: Finished difference Result 1859 states and 5232 transitions. [2021-07-09 18:42:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:42:01,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:01,667 INFO L225 Difference]: With dead ends: 1859 [2021-07-09 18:42:01,667 INFO L226 Difference]: Without dead ends: 1844 [2021-07-09 18:42:01,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:42:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-07-09 18:42:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1527. [2021-07-09 18:42:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.865006553079948) internal successors, (4372), 1526 states have internal predecessors, (4372), 0 states have call successors, (0), 0 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 18:42:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4372 transitions. [2021-07-09 18:42:01,694 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4372 transitions. Word has length 33 [2021-07-09 18:42:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:01,694 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4372 transitions. [2021-07-09 18:42:01,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4372 transitions. [2021-07-09 18:42:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:01,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:01,696 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] [2021-07-09 18:42:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:01,896 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1975374104, now seen corresponding path program 73 times [2021-07-09 18:42:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061869110] [2021-07-09 18:42:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061869110] [2021-07-09 18:42:02,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061869110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381358082] [2021-07-09 18:42:02,021 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 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 18:42:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:02,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:02,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:02,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381358082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:02,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:02,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:02,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764313324] [2021-07-09 18:42:02,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:02,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:02,261 INFO L87 Difference]: Start difference. First operand 1527 states and 4372 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:02,987 INFO L93 Difference]: Finished difference Result 1887 states and 5291 transitions. [2021-07-09 18:42:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:42:02,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:02,990 INFO L225 Difference]: With dead ends: 1887 [2021-07-09 18:42:02,990 INFO L226 Difference]: Without dead ends: 1868 [2021-07-09 18:42:02,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:42:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-07-09 18:42:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1523. [2021-07-09 18:42:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 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 18:42:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-07-09 18:42:03,006 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-07-09 18:42:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:03,006 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-07-09 18:42:03,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-07-09 18:42:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:03,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:03,007 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] [2021-07-09 18:42:03,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:03,208 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1075545832, now seen corresponding path program 74 times [2021-07-09 18:42:03,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:03,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273972236] [2021-07-09 18:42:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:03,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273972236] [2021-07-09 18:42:03,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273972236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888623231] [2021-07-09 18:42:03,334 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 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 18:42:03,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:42:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:03,492 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 5 treesize of output 3 [2021-07-09 18:42:03,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:03,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:03,501 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 18:42:03,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:42:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:03,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888623231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:03,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:03,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:03,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695301794] [2021-07-09 18:42:03,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:03,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:03,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:03,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:03,650 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:04,393 INFO L93 Difference]: Finished difference Result 1849 states and 5192 transitions. [2021-07-09 18:42:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:42:04,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:04,396 INFO L225 Difference]: With dead ends: 1849 [2021-07-09 18:42:04,396 INFO L226 Difference]: Without dead ends: 1834 [2021-07-09 18:42:04,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 729.3ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:42:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2021-07-09 18:42:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1529. [2021-07-09 18:42:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.865183246073298) internal successors, (4378), 1528 states have internal predecessors, (4378), 0 states have call successors, (0), 0 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 18:42:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4378 transitions. [2021-07-09 18:42:04,413 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4378 transitions. Word has length 33 [2021-07-09 18:42:04,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:04,413 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4378 transitions. [2021-07-09 18:42:04,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:04,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4378 transitions. [2021-07-09 18:42:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:04,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:04,414 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] [2021-07-09 18:42:04,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:04,615 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash 688124098, now seen corresponding path program 75 times [2021-07-09 18:42:04,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:04,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616969412] [2021-07-09 18:42:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:04,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:04,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616969412] [2021-07-09 18:42:04,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616969412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:04,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437132988] [2021-07-09 18:42:04,744 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:04,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:42:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:05,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437132988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:05,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:05,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:05,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728636467] [2021-07-09 18:42:05,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:05,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:05,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:05,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:05,018 INFO L87 Difference]: Start difference. First operand 1529 states and 4378 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:05,728 INFO L93 Difference]: Finished difference Result 1873 states and 5237 transitions. [2021-07-09 18:42:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:42:05,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:05,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:05,731 INFO L225 Difference]: With dead ends: 1873 [2021-07-09 18:42:05,731 INFO L226 Difference]: Without dead ends: 1858 [2021-07-09 18:42:05,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:42:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-07-09 18:42:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1523. [2021-07-09 18:42:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.862023653088042) internal successors, (4356), 1522 states have internal predecessors, (4356), 0 states have call successors, (0), 0 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 18:42:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4356 transitions. [2021-07-09 18:42:05,748 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4356 transitions. Word has length 33 [2021-07-09 18:42:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:05,748 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4356 transitions. [2021-07-09 18:42:05,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4356 transitions. [2021-07-09 18:42:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:05,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:05,749 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] [2021-07-09 18:42:05,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 18:42:05,950 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash 748420440, now seen corresponding path program 76 times [2021-07-09 18:42:05,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:05,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350801695] [2021-07-09 18:42:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:06,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350801695] [2021-07-09 18:42:06,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350801695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:06,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116941083] [2021-07-09 18:42:06,075 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:06,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:06,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:06,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116941083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:06,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:06,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:06,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536745128] [2021-07-09 18:42:06,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:06,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:06,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:06,314 INFO L87 Difference]: Start difference. First operand 1523 states and 4356 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:06,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:06,728 INFO L93 Difference]: Finished difference Result 2021 states and 5714 transitions. [2021-07-09 18:42:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:42:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:06,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:06,731 INFO L225 Difference]: With dead ends: 2021 [2021-07-09 18:42:06,731 INFO L226 Difference]: Without dead ends: 2002 [2021-07-09 18:42:06,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:42:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-07-09 18:42:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1527. [2021-07-09 18:42:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.8610747051114025) internal successors, (4366), 1526 states have internal predecessors, (4366), 0 states have call successors, (0), 0 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 18:42:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4366 transitions. [2021-07-09 18:42:06,753 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4366 transitions. Word has length 33 [2021-07-09 18:42:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:06,753 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 4366 transitions. [2021-07-09 18:42:06,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4366 transitions. [2021-07-09 18:42:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:06,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:06,755 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] [2021-07-09 18:42:06,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:06,955 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:06,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:06,956 INFO L82 PathProgramCache]: Analyzing trace with hash 140982680, now seen corresponding path program 77 times [2021-07-09 18:42:06,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:06,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320053640] [2021-07-09 18:42:06,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:07,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:07,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320053640] [2021-07-09 18:42:07,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320053640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:07,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311375003] [2021-07-09 18:42:07,082 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:07,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:42:07,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:07,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311375003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:07,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:07,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239120726] [2021-07-09 18:42:07,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:07,324 INFO L87 Difference]: Start difference. First operand 1527 states and 4366 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:07,756 INFO L93 Difference]: Finished difference Result 2017 states and 5700 transitions. [2021-07-09 18:42:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:42:07,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:07,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:07,759 INFO L225 Difference]: With dead ends: 2017 [2021-07-09 18:42:07,759 INFO L226 Difference]: Without dead ends: 2002 [2021-07-09 18:42:07,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 431.2ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:42:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-07-09 18:42:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1521. [2021-07-09 18:42:07,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 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 18:42:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-07-09 18:42:07,776 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-07-09 18:42:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:07,776 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-07-09 18:42:07,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-07-09 18:42:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:07,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:07,778 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] [2021-07-09 18:42:07,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:42:07,978 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash 678145452, now seen corresponding path program 78 times [2021-07-09 18:42:07,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:07,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042257803] [2021-07-09 18:42:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:08,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:08,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:08,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042257803] [2021-07-09 18:42:08,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042257803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:08,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819754509] [2021-07-09 18:42:08,118 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:08,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:42:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:42:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:08,232 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 5 treesize of output 3 [2021-07-09 18:42:08,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:08,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:08,240 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 18:42:08,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:42:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819754509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:08,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:08,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:08,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530514358] [2021-07-09 18:42:08,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:08,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:08,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:08,396 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:09,409 INFO L93 Difference]: Finished difference Result 2105 states and 5893 transitions. [2021-07-09 18:42:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:42:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:09,412 INFO L225 Difference]: With dead ends: 2105 [2021-07-09 18:42:09,412 INFO L226 Difference]: Without dead ends: 2075 [2021-07-09 18:42:09,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 991.9ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:42:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-07-09 18:42:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1529. [2021-07-09 18:42:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.863874345549738) internal successors, (4376), 1528 states have internal predecessors, (4376), 0 states have call successors, (0), 0 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 18:42:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4376 transitions. [2021-07-09 18:42:09,428 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4376 transitions. Word has length 33 [2021-07-09 18:42:09,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:09,429 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4376 transitions. [2021-07-09 18:42:09,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4376 transitions. [2021-07-09 18:42:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:09,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:09,430 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] [2021-07-09 18:42:09,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:09,631 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:09,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash -198037012, now seen corresponding path program 79 times [2021-07-09 18:42:09,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:09,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905774475] [2021-07-09 18:42:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905774475] [2021-07-09 18:42:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905774475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317753825] [2021-07-09 18:42:09,760 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:09,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317753825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:09,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:09,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:09,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096959575] [2021-07-09 18:42:09,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:09,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:09,995 INFO L87 Difference]: Start difference. First operand 1529 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:10,687 INFO L93 Difference]: Finished difference Result 2290 states and 6454 transitions. [2021-07-09 18:42:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:42:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:10,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:10,691 INFO L225 Difference]: With dead ends: 2290 [2021-07-09 18:42:10,691 INFO L226 Difference]: Without dead ends: 2271 [2021-07-09 18:42:10,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:42:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2021-07-09 18:42:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 1521. [2021-07-09 18:42:10,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 2.860526315789474) internal successors, (4348), 1520 states have internal predecessors, (4348), 0 states have call successors, (0), 0 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 18:42:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4348 transitions. [2021-07-09 18:42:10,709 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4348 transitions. Word has length 33 [2021-07-09 18:42:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:10,709 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 4348 transitions. [2021-07-09 18:42:10,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4348 transitions. [2021-07-09 18:42:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:10,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:10,711 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] [2021-07-09 18:42:10,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:10,911 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:10,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1477950948, now seen corresponding path program 80 times [2021-07-09 18:42:10,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:10,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590541077] [2021-07-09 18:42:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:11,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:11,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590541077] [2021-07-09 18:42:11,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590541077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:11,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68617504] [2021-07-09 18:42:11,044 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:11,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:42:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:11,157 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 5 treesize of output 3 [2021-07-09 18:42:11,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:11,164 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 18:42:11,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:42:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:11,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68617504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:11,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:11,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:11,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319879278] [2021-07-09 18:42:11,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:11,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:11,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:11,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:11,327 INFO L87 Difference]: Start difference. First operand 1521 states and 4348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:12,392 INFO L93 Difference]: Finished difference Result 2089 states and 5825 transitions. [2021-07-09 18:42:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:42:12,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:12,395 INFO L225 Difference]: With dead ends: 2089 [2021-07-09 18:42:12,395 INFO L226 Difference]: Without dead ends: 2059 [2021-07-09 18:42:12,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:42:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-07-09 18:42:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1533. [2021-07-09 18:42:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 2.862924281984334) internal successors, (4386), 1532 states have internal predecessors, (4386), 0 states have call successors, (0), 0 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 18:42:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 4386 transitions. [2021-07-09 18:42:12,412 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 4386 transitions. Word has length 33 [2021-07-09 18:42:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:12,412 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 4386 transitions. [2021-07-09 18:42:12,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 4386 transitions. [2021-07-09 18:42:12,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:12,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:12,413 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] [2021-07-09 18:42:12,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:12,614 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:12,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash 285718982, now seen corresponding path program 81 times [2021-07-09 18:42:12,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:12,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215122208] [2021-07-09 18:42:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:12,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:12,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215122208] [2021-07-09 18:42:12,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215122208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:12,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314627735] [2021-07-09 18:42:12,743 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:12,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:12,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:12,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:42:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:12,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314627735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:12,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:12,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:12,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885906916] [2021-07-09 18:42:12,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:12,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:12,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:12,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:12,996 INFO L87 Difference]: Start difference. First operand 1533 states and 4386 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:13,550 INFO L93 Difference]: Finished difference Result 2274 states and 6386 transitions. [2021-07-09 18:42:13,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:42:13,550 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:13,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:13,553 INFO L225 Difference]: With dead ends: 2274 [2021-07-09 18:42:13,553 INFO L226 Difference]: Without dead ends: 2259 [2021-07-09 18:42:13,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 590.1ms TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:42:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-07-09 18:42:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1519. [2021-07-09 18:42:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.86034255599473) internal successors, (4342), 1518 states have internal predecessors, (4342), 0 states have call successors, (0), 0 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 18:42:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4342 transitions. [2021-07-09 18:42:13,571 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4342 transitions. Word has length 33 [2021-07-09 18:42:13,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:13,571 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4342 transitions. [2021-07-09 18:42:13,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:13,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4342 transitions. [2021-07-09 18:42:13,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:13,572 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:13,572 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] [2021-07-09 18:42:13,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:13,773 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -259979270, now seen corresponding path program 82 times [2021-07-09 18:42:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:13,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447649758] [2021-07-09 18:42:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:13,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:13,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447649758] [2021-07-09 18:42:13,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447649758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:13,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322155121] [2021-07-09 18:42:13,916 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:13,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:14,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322155121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:14,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:14,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:14,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464409025] [2021-07-09 18:42:14,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:14,157 INFO L87 Difference]: Start difference. First operand 1519 states and 4342 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:15,130 INFO L93 Difference]: Finished difference Result 2065 states and 5781 transitions. [2021-07-09 18:42:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:42:15,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:15,133 INFO L225 Difference]: With dead ends: 2065 [2021-07-09 18:42:15,133 INFO L226 Difference]: Without dead ends: 2050 [2021-07-09 18:42:15,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:42:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-07-09 18:42:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1523. [2021-07-09 18:42:15,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1523 states, 1522 states have (on average 2.863337713534823) internal successors, (4358), 1522 states have internal predecessors, (4358), 0 states have call successors, (0), 0 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 18:42:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 4358 transitions. [2021-07-09 18:42:15,151 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 4358 transitions. Word has length 33 [2021-07-09 18:42:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:15,151 INFO L482 AbstractCegarLoop]: Abstraction has 1523 states and 4358 transitions. [2021-07-09 18:42:15,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 4358 transitions. [2021-07-09 18:42:15,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:15,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:15,152 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] [2021-07-09 18:42:15,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:15,368 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:15,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:15,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1136161734, now seen corresponding path program 83 times [2021-07-09 18:42:15,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:15,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319644481] [2021-07-09 18:42:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:15,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:15,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319644481] [2021-07-09 18:42:15,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319644481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:15,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226221170] [2021-07-09 18:42:15,496 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:15,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:15,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:15,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226221170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:15,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:15,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:15,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054420037] [2021-07-09 18:42:15,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:15,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:15,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:15,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:15,739 INFO L87 Difference]: Start difference. First operand 1523 states and 4358 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:16,434 INFO L93 Difference]: Finished difference Result 2437 states and 6835 transitions. [2021-07-09 18:42:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:42:16,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:16,438 INFO L225 Difference]: With dead ends: 2437 [2021-07-09 18:42:16,438 INFO L226 Difference]: Without dead ends: 2418 [2021-07-09 18:42:16,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 588.2ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:42:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-07-09 18:42:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 1511. [2021-07-09 18:42:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 2.8596026490066224) internal successors, (4318), 1510 states have internal predecessors, (4318), 0 states have call successors, (0), 0 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 18:42:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 4318 transitions. [2021-07-09 18:42:16,457 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 4318 transitions. Word has length 33 [2021-07-09 18:42:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:16,457 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 4318 transitions. [2021-07-09 18:42:16,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 4318 transitions. [2021-07-09 18:42:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:16,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:16,459 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] [2021-07-09 18:42:16,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:16,659 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 733347160, now seen corresponding path program 84 times [2021-07-09 18:42:16,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:16,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694428430] [2021-07-09 18:42:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:16,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694428430] [2021-07-09 18:42:16,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694428430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:16,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541163109] [2021-07-09 18:42:16,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:16,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:42:16,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:16,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:42:16,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:16,901 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 5 treesize of output 3 [2021-07-09 18:42:16,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,909 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 18:42:16,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:19 [2021-07-09 18:42:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:17,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541163109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:17,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:17,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 18:42:17,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774639765] [2021-07-09 18:42:17,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:42:17,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:17,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:42:17,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:42:17,057 INFO L87 Difference]: Start difference. First operand 1511 states and 4318 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:18,088 INFO L93 Difference]: Finished difference Result 2034 states and 5661 transitions. [2021-07-09 18:42:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:42:18,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:18,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:18,091 INFO L225 Difference]: With dead ends: 2034 [2021-07-09 18:42:18,091 INFO L226 Difference]: Without dead ends: 2019 [2021-07-09 18:42:18,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 974.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-07-09 18:42:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1517. [2021-07-09 18:42:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.862796833773087) internal successors, (4340), 1516 states have internal predecessors, (4340), 0 states have call successors, (0), 0 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 18:42:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 4340 transitions. [2021-07-09 18:42:18,115 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 4340 transitions. Word has length 33 [2021-07-09 18:42:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:18,115 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 4340 transitions. [2021-07-09 18:42:18,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 18:42:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 4340 transitions. [2021-07-09 18:42:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 18:42:18,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:18,116 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] [2021-07-09 18:42:18,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:18,317 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1797950206, now seen corresponding path program 85 times [2021-07-09 18:42:18,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423521782] [2021-07-09 18:42:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:18,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423521782] [2021-07-09 18:42:18,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423521782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:18,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558792383] [2021-07-09 18:42:18,465 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:42:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:18,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558792383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:18,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:18,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:42:18,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519483741] [2021-07-09 18:42:18,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:42:18,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:18,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:42:18,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:42:18,738 INFO L87 Difference]: Start difference. First operand 1517 states and 4340 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:19,380 INFO L93 Difference]: Finished difference Result 2295 states and 6421 transitions. [2021-07-09 18:42:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:42:19,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-09 18:42:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:19,383 INFO L225 Difference]: With dead ends: 2295 [2021-07-09 18:42:19,383 INFO L226 Difference]: Without dead ends: 2280 [2021-07-09 18:42:19,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:42:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-07-09 18:42:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1450. [2021-07-09 18:42:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 2.8612836438923397) internal successors, (4146), 1449 states have internal predecessors, (4146), 0 states have call successors, (0), 0 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 18:42:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 4146 transitions. [2021-07-09 18:42:19,400 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 4146 transitions. Word has length 33 [2021-07-09 18:42:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:19,400 INFO L482 AbstractCegarLoop]: Abstraction has 1450 states and 4146 transitions. [2021-07-09 18:42:19,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 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 18:42:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 4146 transitions. [2021-07-09 18:42:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 18:42:19,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:19,402 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, 1, 1, 1] [2021-07-09 18:42:19,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:42:19,602 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1705235750, now seen corresponding path program 1 times [2021-07-09 18:42:19,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:19,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815266031] [2021-07-09 18:42:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:19,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815266031] [2021-07-09 18:42:19,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815266031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697680810] [2021-07-09 18:42:19,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:42:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:19,665 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 18:42:19,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:19,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:19,667 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 18:42:19,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:42:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697680810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:19,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:42:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740044802] [2021-07-09 18:42:19,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:42:19,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:19,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:42:19,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:42:19,688 INFO L87 Difference]: Start difference. First operand 1450 states and 4146 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:19,760 INFO L93 Difference]: Finished difference Result 1940 states and 5616 transitions. [2021-07-09 18:42:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:42:19,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-09 18:42:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:19,763 INFO L225 Difference]: With dead ends: 1940 [2021-07-09 18:42:19,763 INFO L226 Difference]: Without dead ends: 1940 [2021-07-09 18:42:19,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:42:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-07-09 18:42:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1810. [2021-07-09 18:42:19,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 2.902155887230514) internal successors, (5250), 1809 states have internal predecessors, (5250), 0 states have call successors, (0), 0 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 18:42:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5250 transitions. [2021-07-09 18:42:19,782 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5250 transitions. Word has length 37 [2021-07-09 18:42:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:19,782 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 5250 transitions. [2021-07-09 18:42:19,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:19,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5250 transitions. [2021-07-09 18:42:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 18:42:19,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:19,784 INFO L508 BasicCegarLoop]: trace histogram [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, 1] [2021-07-09 18:42:19,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:19,985 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:19,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:19,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2021073332, now seen corresponding path program 86 times [2021-07-09 18:42:19,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:19,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022150649] [2021-07-09 18:42:19,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:19,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:19,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022150649] [2021-07-09 18:42:19,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022150649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:19,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500638911] [2021-07-09 18:42:19,998 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:20,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:20,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:42:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500638911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:20,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:20,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-07-09 18:42:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14065912] [2021-07-09 18:42:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:42:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:42:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:42:20,074 INFO L87 Difference]: Start difference. First operand 1810 states and 5250 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 18:42:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:20,087 INFO L93 Difference]: Finished difference Result 2953 states and 8537 transitions. [2021-07-09 18:42:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:42:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 18:42:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:20,091 INFO L225 Difference]: With dead ends: 2953 [2021-07-09 18:42:20,091 INFO L226 Difference]: Without dead ends: 2856 [2021-07-09 18:42:20,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:42:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-07-09 18:42:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2284. [2021-07-09 18:42:20,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 2.9890494962768286) internal successors, (6824), 2283 states have internal predecessors, (6824), 0 states have call successors, (0), 0 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 18:42:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 6824 transitions. [2021-07-09 18:42:20,119 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 6824 transitions. Word has length 38 [2021-07-09 18:42:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:20,120 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 6824 transitions. [2021-07-09 18:42:20,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 18:42:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 6824 transitions. [2021-07-09 18:42:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:42:20,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:20,122 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:20,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:42:20,336 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:20,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1709240700, now seen corresponding path program 87 times [2021-07-09 18:42:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:20,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160615898] [2021-07-09 18:42:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:42:20,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160615898] [2021-07-09 18:42:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160615898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:20,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132756499] [2021-07-09 18:42:20,352 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:20,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:42:20,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:42:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:42:20,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132756499] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:42:20,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:42:20,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-07-09 18:42:20,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470028932] [2021-07-09 18:42:20,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:42:20,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:42:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:42:20,429 INFO L87 Difference]: Start difference. First operand 2284 states and 6824 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 18:42:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:20,491 INFO L93 Difference]: Finished difference Result 6496 states and 19271 transitions. [2021-07-09 18:42:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:42:20,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 39 [2021-07-09 18:42:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:20,503 INFO L225 Difference]: With dead ends: 6496 [2021-07-09 18:42:20,503 INFO L226 Difference]: Without dead ends: 6091 [2021-07-09 18:42:20,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:42:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6091 states. [2021-07-09 18:42:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6091 to 5331. [2021-07-09 18:42:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 3.052908067542214) internal successors, (16272), 5330 states have internal predecessors, (16272), 0 states have call successors, (0), 0 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 18:42:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 16272 transitions. [2021-07-09 18:42:20,604 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 16272 transitions. Word has length 39 [2021-07-09 18:42:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:20,604 INFO L482 AbstractCegarLoop]: Abstraction has 5331 states and 16272 transitions. [2021-07-09 18:42:20,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 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 18:42:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 16272 transitions. [2021-07-09 18:42:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:42:20,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:20,611 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:42:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:20,820 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:20,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1357605966, now seen corresponding path program 2 times [2021-07-09 18:42:20,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342560589] [2021-07-09 18:42:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342560589] [2021-07-09 18:42:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342560589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053751200] [2021-07-09 18:42:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:20,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:20,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:42:20,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:20,907 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 18:42:20,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:20,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:20,915 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 18:42:20,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-07-09 18:42:20,935 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 18:42:20,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:20,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:20,937 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 18:42:20,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-07-09 18:42:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:20,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053751200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:20,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:20,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-09 18:42:20,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369491254] [2021-07-09 18:42:20,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:42:20,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:20,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:42:20,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:42:20,961 INFO L87 Difference]: Start difference. First operand 5331 states and 16272 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:21,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:21,112 INFO L93 Difference]: Finished difference Result 7486 states and 22666 transitions. [2021-07-09 18:42:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:42:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:42:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:21,125 INFO L225 Difference]: With dead ends: 7486 [2021-07-09 18:42:21,125 INFO L226 Difference]: Without dead ends: 7486 [2021-07-09 18:42:21,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:42:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7486 states. [2021-07-09 18:42:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7486 to 6990. [2021-07-09 18:42:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6990 states, 6989 states have (on average 3.0479324653026185) internal successors, (21302), 6989 states have internal predecessors, (21302), 0 states have call successors, (0), 0 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 18:42:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6990 states to 6990 states and 21302 transitions. [2021-07-09 18:42:21,237 INFO L78 Accepts]: Start accepts. Automaton has 6990 states and 21302 transitions. Word has length 43 [2021-07-09 18:42:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:21,237 INFO L482 AbstractCegarLoop]: Abstraction has 6990 states and 21302 transitions. [2021-07-09 18:42:21,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6990 states and 21302 transitions. [2021-07-09 18:42:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:21,246 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:21,246 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:21,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:21,463 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1767290736, now seen corresponding path program 3 times [2021-07-09 18:42:21,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:21,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691009511] [2021-07-09 18:42:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:21,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:21,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691009511] [2021-07-09 18:42:21,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691009511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:21,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185153110] [2021-07-09 18:42:21,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:21,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:42:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:22,027 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 18:42:22,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:22,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:22,039 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 18:42:22,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:42:22,223 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 18:42:22,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:22,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:22,235 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 18:42:22,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:22,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185153110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:22,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:22,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:22,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205467407] [2021-07-09 18:42:22,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:22,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:22,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:22,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:22,676 INFO L87 Difference]: Start difference. First operand 6990 states and 21302 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:24,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:24,920 INFO L93 Difference]: Finished difference Result 9371 states and 28152 transitions. [2021-07-09 18:42:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:42:24,920 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:24,934 INFO L225 Difference]: With dead ends: 9371 [2021-07-09 18:42:24,934 INFO L226 Difference]: Without dead ends: 9227 [2021-07-09 18:42:24,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2197.9ms TimeCoverageRelationStatistics Valid=311, Invalid=4381, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:42:24,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9227 states. [2021-07-09 18:42:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9227 to 7077. [2021-07-09 18:42:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7077 states, 7076 states have (on average 3.0415488976823064) internal successors, (21522), 7076 states have internal predecessors, (21522), 0 states have call successors, (0), 0 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 18:42:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7077 states to 7077 states and 21522 transitions. [2021-07-09 18:42:25,047 INFO L78 Accepts]: Start accepts. Automaton has 7077 states and 21522 transitions. Word has length 48 [2021-07-09 18:42:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:25,047 INFO L482 AbstractCegarLoop]: Abstraction has 7077 states and 21522 transitions. [2021-07-09 18:42:25,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 7077 states and 21522 transitions. [2021-07-09 18:42:25,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:25,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:25,056 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:25,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:25,257 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1659840368, now seen corresponding path program 4 times [2021-07-09 18:42:25,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:25,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173801722] [2021-07-09 18:42:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:25,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:25,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173801722] [2021-07-09 18:42:25,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173801722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:25,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139984340] [2021-07-09 18:42:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:25,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:25,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:42:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:25,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:25,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:25,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:25,787 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 18:42:25,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:42:25,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:25,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:25,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:25,981 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 18:42:25,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:42:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:26,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139984340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:26,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:26,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:26,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721106417] [2021-07-09 18:42:26,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:26,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:26,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:26,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:26,394 INFO L87 Difference]: Start difference. First operand 7077 states and 21522 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:28,996 INFO L93 Difference]: Finished difference Result 8118 states and 24576 transitions. [2021-07-09 18:42:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:42:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:29,011 INFO L225 Difference]: With dead ends: 8118 [2021-07-09 18:42:29,011 INFO L226 Difference]: Without dead ends: 8078 [2021-07-09 18:42:29,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 2503.2ms TimeCoverageRelationStatistics Valid=358, Invalid=4612, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:42:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-07-09 18:42:29,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 7089. [2021-07-09 18:42:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7089 states, 7088 states have (on average 3.0404909706546275) internal successors, (21551), 7088 states have internal predecessors, (21551), 0 states have call successors, (0), 0 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 18:42:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7089 states to 7089 states and 21551 transitions. [2021-07-09 18:42:29,118 INFO L78 Accepts]: Start accepts. Automaton has 7089 states and 21551 transitions. Word has length 48 [2021-07-09 18:42:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:29,118 INFO L482 AbstractCegarLoop]: Abstraction has 7089 states and 21551 transitions. [2021-07-09 18:42:29,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7089 states and 21551 transitions. [2021-07-09 18:42:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:29,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:29,127 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:29,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:29,328 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:29,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:29,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1758944464, now seen corresponding path program 5 times [2021-07-09 18:42:29,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:29,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533993524] [2021-07-09 18:42:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:29,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:29,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533993524] [2021-07-09 18:42:29,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533993524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:29,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519914445] [2021-07-09 18:42:29,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:29,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:29,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:42:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:29,829 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 18:42:29,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:29,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:29,840 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 18:42:29,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:42:30,021 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 18:42:30,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:30,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:30,033 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 18:42:30,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:30,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519914445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:30,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:30,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:30,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665966600] [2021-07-09 18:42:30,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:30,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:30,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:30,450 INFO L87 Difference]: Start difference. First operand 7089 states and 21551 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:32,668 INFO L93 Difference]: Finished difference Result 9255 states and 27858 transitions. [2021-07-09 18:42:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:42:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:32,686 INFO L225 Difference]: With dead ends: 9255 [2021-07-09 18:42:32,686 INFO L226 Difference]: Without dead ends: 9216 [2021-07-09 18:42:32,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2166.2ms TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:42:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-07-09 18:42:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 7085. [2021-07-09 18:42:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.0406549971767363) internal successors, (21540), 7084 states have internal predecessors, (21540), 0 states have call successors, (0), 0 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 18:42:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 21540 transitions. [2021-07-09 18:42:32,857 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 21540 transitions. Word has length 48 [2021-07-09 18:42:32,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:32,857 INFO L482 AbstractCegarLoop]: Abstraction has 7085 states and 21540 transitions. [2021-07-09 18:42:32,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 21540 transitions. [2021-07-09 18:42:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:32,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:32,867 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:33,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 18:42:33,068 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:33,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1900659604, now seen corresponding path program 6 times [2021-07-09 18:42:33,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:33,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516743199] [2021-07-09 18:42:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:33,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516743199] [2021-07-09 18:42:33,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516743199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474819888] [2021-07-09 18:42:33,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:33,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:33,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:42:33,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:33,591 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 18:42:33,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:33,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:33,603 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 18:42:33,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:42:33,860 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 18:42:33,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:33,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:33,872 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 18:42:33,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:34,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474819888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:34,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:34,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:42:34,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773377726] [2021-07-09 18:42:34,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:42:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:42:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:34,300 INFO L87 Difference]: Start difference. First operand 7085 states and 21540 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:42:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:36,846 INFO L93 Difference]: Finished difference Result 9350 states and 28063 transitions. [2021-07-09 18:42:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:42:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:42:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:36,863 INFO L225 Difference]: With dead ends: 9350 [2021-07-09 18:42:36,864 INFO L226 Difference]: Without dead ends: 9293 [2021-07-09 18:42:36,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 2298.0ms TimeCoverageRelationStatistics Valid=348, Invalid=4764, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:42:36,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2021-07-09 18:42:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 7091. [2021-07-09 18:42:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7091 states, 7090 states have (on average 3.0399153737658673) internal successors, (21553), 7090 states have internal predecessors, (21553), 0 states have call successors, (0), 0 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 18:42:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7091 states to 7091 states and 21553 transitions. [2021-07-09 18:42:37,005 INFO L78 Accepts]: Start accepts. Automaton has 7091 states and 21553 transitions. Word has length 48 [2021-07-09 18:42:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:37,005 INFO L482 AbstractCegarLoop]: Abstraction has 7091 states and 21553 transitions. [2021-07-09 18:42:37,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:42:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 7091 states and 21553 transitions. [2021-07-09 18:42:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:37,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:37,015 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:37,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:37,215 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 617512144, now seen corresponding path program 7 times [2021-07-09 18:42:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:37,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27987934] [2021-07-09 18:42:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:37,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:37,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27987934] [2021-07-09 18:42:37,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27987934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:37,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203517440] [2021-07-09 18:42:37,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:37,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:42:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:37,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:37,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:37,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:37,750 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 18:42:37,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:42:37,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:37,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:37,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:37,939 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 18:42:37,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:42:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:38,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203517440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:38,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:38,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:38,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619929682] [2021-07-09 18:42:38,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:38,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:38,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:38,332 INFO L87 Difference]: Start difference. First operand 7091 states and 21553 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:40,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:40,530 INFO L93 Difference]: Finished difference Result 9305 states and 27967 transitions. [2021-07-09 18:42:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:42:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:40,547 INFO L225 Difference]: With dead ends: 9305 [2021-07-09 18:42:40,547 INFO L226 Difference]: Without dead ends: 9211 [2021-07-09 18:42:40,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2111.5ms TimeCoverageRelationStatistics Valid=306, Invalid=4250, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:42:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-07-09 18:42:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 7071. [2021-07-09 18:42:40,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.0424328147100423) internal successors, (21510), 7070 states have internal predecessors, (21510), 0 states have call successors, (0), 0 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 18:42:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 21510 transitions. [2021-07-09 18:42:40,663 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 21510 transitions. Word has length 48 [2021-07-09 18:42:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:40,663 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 21510 transitions. [2021-07-09 18:42:40,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 21510 transitions. [2021-07-09 18:42:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:40,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:40,672 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:40,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 18:42:40,872 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:40,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1571181776, now seen corresponding path program 8 times [2021-07-09 18:42:40,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:40,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822789930] [2021-07-09 18:42:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:41,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:41,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822789930] [2021-07-09 18:42:41,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822789930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:41,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276966204] [2021-07-09 18:42:41,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:41,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:42:41,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:42:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:41,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:41,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:41,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:41,381 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 18:42:41,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:42:41,586 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 18:42:41,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:41,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:41,598 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 18:42:41,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:42,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276966204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:42,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:42,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:42:42,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668199355] [2021-07-09 18:42:42,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:42:42,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:42,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:42:42,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:42,060 INFO L87 Difference]: Start difference. First operand 7071 states and 21510 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:42:44,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:44,551 INFO L93 Difference]: Finished difference Result 9451 states and 28333 transitions. [2021-07-09 18:42:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:42:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:42:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:44,568 INFO L225 Difference]: With dead ends: 9451 [2021-07-09 18:42:44,568 INFO L226 Difference]: Without dead ends: 9307 [2021-07-09 18:42:44,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 2212.3ms TimeCoverageRelationStatistics Valid=339, Invalid=4773, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:42:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2021-07-09 18:42:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 7131. [2021-07-09 18:42:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7130 states have (on average 3.0359046283309956) internal successors, (21646), 7130 states have internal predecessors, (21646), 0 states have call successors, (0), 0 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 18:42:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 21646 transitions. [2021-07-09 18:42:44,687 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 21646 transitions. Word has length 48 [2021-07-09 18:42:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:44,687 INFO L482 AbstractCegarLoop]: Abstraction has 7131 states and 21646 transitions. [2021-07-09 18:42:44,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:42:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 21646 transitions. [2021-07-09 18:42:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:44,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:44,696 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:44,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:44,898 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:44,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:44,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1597250652, now seen corresponding path program 9 times [2021-07-09 18:42:44,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:44,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479420321] [2021-07-09 18:42:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:45,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:45,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479420321] [2021-07-09 18:42:45,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479420321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036354959] [2021-07-09 18:42:45,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:45,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:42:45,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:42:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:45,439 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 18:42:45,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:45,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:45,451 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 18:42:45,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:42:45,634 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 18:42:45,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:45,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:45,645 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 18:42:45,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:46,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036354959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:46,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:46,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:46,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535396319] [2021-07-09 18:42:46,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:46,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:46,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:46,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:46,059 INFO L87 Difference]: Start difference. First operand 7131 states and 21646 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:48,631 INFO L93 Difference]: Finished difference Result 8182 states and 24723 transitions. [2021-07-09 18:42:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:42:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:48,644 INFO L225 Difference]: With dead ends: 8182 [2021-07-09 18:42:48,644 INFO L226 Difference]: Without dead ends: 8142 [2021-07-09 18:42:48,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 2557.8ms TimeCoverageRelationStatistics Valid=358, Invalid=4612, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:42:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2021-07-09 18:42:48,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7149. [2021-07-09 18:42:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 3.0345551203133745) internal successors, (21691), 7148 states have internal predecessors, (21691), 0 states have call successors, (0), 0 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 18:42:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 21691 transitions. [2021-07-09 18:42:48,744 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 21691 transitions. Word has length 48 [2021-07-09 18:42:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:48,744 INFO L482 AbstractCegarLoop]: Abstraction has 7149 states and 21691 transitions. [2021-07-09 18:42:48,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 21691 transitions. [2021-07-09 18:42:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:48,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:48,753 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:48,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:48,954 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:48,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1368491808, now seen corresponding path program 10 times [2021-07-09 18:42:48,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:48,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168371685] [2021-07-09 18:42:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:49,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:49,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168371685] [2021-07-09 18:42:49,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168371685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:49,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235948496] [2021-07-09 18:42:49,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:49,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:42:49,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:49,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:42:49,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:49,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:49,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:49,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:49,458 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 18:42:49,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:42:49,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:42:49,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:49,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:49,651 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 18:42:49,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:42:50,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:50,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235948496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:50,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:50,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:50,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539898832] [2021-07-09 18:42:50,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:50,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:50,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:50,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:50,046 INFO L87 Difference]: Start difference. First operand 7149 states and 21691 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:52,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:52,415 INFO L93 Difference]: Finished difference Result 9301 states and 27958 transitions. [2021-07-09 18:42:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:42:52,415 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:52,431 INFO L225 Difference]: With dead ends: 9301 [2021-07-09 18:42:52,431 INFO L226 Difference]: Without dead ends: 9256 [2021-07-09 18:42:52,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2174.5ms TimeCoverageRelationStatistics Valid=312, Invalid=4380, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:42:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9256 states. [2021-07-09 18:42:52,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9256 to 7143. [2021-07-09 18:42:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 3.0344441332959957) internal successors, (21672), 7142 states have internal predecessors, (21672), 0 states have call successors, (0), 0 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 18:42:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 21672 transitions. [2021-07-09 18:42:52,560 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 21672 transitions. Word has length 48 [2021-07-09 18:42:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:52,561 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 21672 transitions. [2021-07-09 18:42:52,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 21672 transitions. [2021-07-09 18:42:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:52,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:52,570 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:52,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 18:42:52,771 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:52,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:52,771 INFO L82 PathProgramCache]: Analyzing trace with hash 421760008, now seen corresponding path program 11 times [2021-07-09 18:42:52,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:52,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091733767] [2021-07-09 18:42:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:53,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091733767] [2021-07-09 18:42:53,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091733767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195818093] [2021-07-09 18:42:53,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:53,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:42:53,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:53,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:42:53,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:53,278 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 18:42:53,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:53,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:53,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:42:53,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:42:53,466 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 18:42:53,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:53,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:53,478 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 18:42:53,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:53,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195818093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:53,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:53,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:42:53,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939147295] [2021-07-09 18:42:53,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:42:53,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:42:53,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:42:53,908 INFO L87 Difference]: Start difference. First operand 7143 states and 21672 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:42:56,199 INFO L93 Difference]: Finished difference Result 9432 states and 28244 transitions. [2021-07-09 18:42:56,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:42:56,199 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:42:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:42:56,215 INFO L225 Difference]: With dead ends: 9432 [2021-07-09 18:42:56,216 INFO L226 Difference]: Without dead ends: 9373 [2021-07-09 18:42:56,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2143.3ms TimeCoverageRelationStatistics Valid=306, Invalid=4250, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:42:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9373 states. [2021-07-09 18:42:56,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9373 to 7149. [2021-07-09 18:42:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 3.0337157246782316) internal successors, (21685), 7148 states have internal predecessors, (21685), 0 states have call successors, (0), 0 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 18:42:56,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 21685 transitions. [2021-07-09 18:42:56,336 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 21685 transitions. Word has length 48 [2021-07-09 18:42:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:42:56,336 INFO L482 AbstractCegarLoop]: Abstraction has 7149 states and 21685 transitions. [2021-07-09 18:42:56,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:42:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 21685 transitions. [2021-07-09 18:42:56,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:42:56,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:42:56,345 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:42:56,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:42:56,546 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:42:56,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:42:56,546 INFO L82 PathProgramCache]: Analyzing trace with hash 267322490, now seen corresponding path program 12 times [2021-07-09 18:42:56,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:42:56,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452750445] [2021-07-09 18:42:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:42:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:42:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:56,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:42:56,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452750445] [2021-07-09 18:42:56,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452750445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:56,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179786716] [2021-07-09 18:42:56,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:42:57,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:42:57,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:42:57,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:42:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:57,086 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 18:42:57,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:57,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:57,097 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 18:42:57,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:42:57,283 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 18:42:57,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:57,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:57,294 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 18:42:57,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:42:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:57,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179786716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:57,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:57,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:42:57,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839780142] [2021-07-09 18:42:57,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:42:57,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:57,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:42:57,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:42:57,773 INFO L87 Difference]: Start difference. First operand 7149 states and 21685 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:43:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:00,027 INFO L93 Difference]: Finished difference Result 9391 states and 28168 transitions. [2021-07-09 18:43:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:43:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:00,044 INFO L225 Difference]: With dead ends: 9391 [2021-07-09 18:43:00,044 INFO L226 Difference]: Without dead ends: 9235 [2021-07-09 18:43:00,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2239.0ms TimeCoverageRelationStatistics Valid=334, Invalid=4636, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:43:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9235 states. [2021-07-09 18:43:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9235 to 7083. [2021-07-09 18:43:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0381248234961875) internal successors, (21516), 7082 states have internal predecessors, (21516), 0 states have call successors, (0), 0 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 18:43:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21516 transitions. [2021-07-09 18:43:00,160 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21516 transitions. Word has length 48 [2021-07-09 18:43:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:00,160 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21516 transitions. [2021-07-09 18:43:00,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:43:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21516 transitions. [2021-07-09 18:43:00,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:00,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:00,169 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:00,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,370 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:00,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:00,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1256064880, now seen corresponding path program 13 times [2021-07-09 18:43:00,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:00,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948824912] [2021-07-09 18:43:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:00,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:00,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948824912] [2021-07-09 18:43:00,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948824912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:00,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672485454] [2021-07-09 18:43:00,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:00,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:00,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:00,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:00,920 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 18:43:00,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:43:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:01,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:01,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:01,108 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 18:43:01,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:01,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672485454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:01,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:01,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303010622] [2021-07-09 18:43:01,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:01,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:01,518 INFO L87 Difference]: Start difference. First operand 7083 states and 21516 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:04,260 INFO L93 Difference]: Finished difference Result 8124 states and 24570 transitions. [2021-07-09 18:43:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:43:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:04,275 INFO L225 Difference]: With dead ends: 8124 [2021-07-09 18:43:04,275 INFO L226 Difference]: Without dead ends: 8084 [2021-07-09 18:43:04,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2592.1ms TimeCoverageRelationStatistics Valid=374, Invalid=4456, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:43:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2021-07-09 18:43:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7091. [2021-07-09 18:43:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7091 states, 7090 states have (on average 3.03737658674189) internal successors, (21535), 7090 states have internal predecessors, (21535), 0 states have call successors, (0), 0 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 18:43:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7091 states to 7091 states and 21535 transitions. [2021-07-09 18:43:04,382 INFO L78 Accepts]: Start accepts. Automaton has 7091 states and 21535 transitions. Word has length 48 [2021-07-09 18:43:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:04,382 INFO L482 AbstractCegarLoop]: Abstraction has 7091 states and 21535 transitions. [2021-07-09 18:43:04,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7091 states and 21535 transitions. [2021-07-09 18:43:04,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:04,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:04,392 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:04,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:43:04,592 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2132247344, now seen corresponding path program 14 times [2021-07-09 18:43:04,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:04,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938699074] [2021-07-09 18:43:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:05,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:05,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938699074] [2021-07-09 18:43:05,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938699074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:05,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009583668] [2021-07-09 18:43:05,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:05,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:05,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:05,125 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 18:43:05,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:05,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:05,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:05,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:05,321 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 18:43:05,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:05,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:05,333 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 18:43:05,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:05,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009583668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:05,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:05,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:05,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942327939] [2021-07-09 18:43:05,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:05,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:05,748 INFO L87 Difference]: Start difference. First operand 7091 states and 21535 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:08,250 INFO L93 Difference]: Finished difference Result 8090 states and 24501 transitions. [2021-07-09 18:43:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:08,265 INFO L225 Difference]: With dead ends: 8090 [2021-07-09 18:43:08,265 INFO L226 Difference]: Without dead ends: 8051 [2021-07-09 18:43:08,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2415.2ms TimeCoverageRelationStatistics Valid=345, Invalid=4347, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:43:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-07-09 18:43:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 7087. [2021-07-09 18:43:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 3.0379621789443974) internal successors, (21527), 7086 states have internal predecessors, (21527), 0 states have call successors, (0), 0 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 18:43:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 21527 transitions. [2021-07-09 18:43:08,371 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 21527 transitions. Word has length 48 [2021-07-09 18:43:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:08,371 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 21527 transitions. [2021-07-09 18:43:08,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 21527 transitions. [2021-07-09 18:43:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:08,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:08,381 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:08,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:43:08,582 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:08,582 INFO L82 PathProgramCache]: Analyzing trace with hash -888199984, now seen corresponding path program 15 times [2021-07-09 18:43:08,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:08,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302846151] [2021-07-09 18:43:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:08,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302846151] [2021-07-09 18:43:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302846151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390398787] [2021-07-09 18:43:08,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:09,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:09,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:09,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:43:09,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:09,123 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 18:43:09,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:09,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:09,134 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 18:43:09,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:09,322 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 18:43:09,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:09,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:09,334 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 18:43:09,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:09,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390398787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:09,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:09,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:09,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046846463] [2021-07-09 18:43:09,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:09,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:09,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:09,759 INFO L87 Difference]: Start difference. First operand 7087 states and 21527 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:12,478 INFO L93 Difference]: Finished difference Result 8130 states and 24582 transitions. [2021-07-09 18:43:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:43:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:12,491 INFO L225 Difference]: With dead ends: 8130 [2021-07-09 18:43:12,492 INFO L226 Difference]: Without dead ends: 8090 [2021-07-09 18:43:12,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2666.9ms TimeCoverageRelationStatistics Valid=374, Invalid=4456, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:43:12,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-07-09 18:43:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7093. [2021-07-09 18:43:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 7092 states have (on average 3.0372250423011846) internal successors, (21540), 7092 states have internal predecessors, (21540), 0 states have call successors, (0), 0 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 18:43:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 21540 transitions. [2021-07-09 18:43:12,593 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 21540 transitions. Word has length 48 [2021-07-09 18:43:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:12,593 INFO L482 AbstractCegarLoop]: Abstraction has 7093 states and 21540 transitions. [2021-07-09 18:43:12,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 21540 transitions. [2021-07-09 18:43:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:12,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:12,602 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:12,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 18:43:12,803 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash 875469946, now seen corresponding path program 16 times [2021-07-09 18:43:12,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:12,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110899656] [2021-07-09 18:43:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:13,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:13,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110899656] [2021-07-09 18:43:13,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110899656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:13,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260551868] [2021-07-09 18:43:13,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:13,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:13,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:13,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:13,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:13,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:13,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:13,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:13,391 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 18:43:13,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:43:13,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:13,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:13,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:13,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:13,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:13,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260551868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:13,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:13,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204901812] [2021-07-09 18:43:13,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:13,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:13,998 INFO L87 Difference]: Start difference. First operand 7093 states and 21540 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:16,489 INFO L93 Difference]: Finished difference Result 8100 states and 24522 transitions. [2021-07-09 18:43:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:16,503 INFO L225 Difference]: With dead ends: 8100 [2021-07-09 18:43:16,503 INFO L226 Difference]: Without dead ends: 8055 [2021-07-09 18:43:16,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2400.8ms TimeCoverageRelationStatistics Valid=345, Invalid=4347, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:43:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8055 states. [2021-07-09 18:43:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8055 to 7087. [2021-07-09 18:43:16,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 3.037679932260796) internal successors, (21525), 7086 states have internal predecessors, (21525), 0 states have call successors, (0), 0 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 18:43:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 21525 transitions. [2021-07-09 18:43:16,612 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 21525 transitions. Word has length 48 [2021-07-09 18:43:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:16,612 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 21525 transitions. [2021-07-09 18:43:16,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 21525 transitions. [2021-07-09 18:43:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:16,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:16,622 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:16,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:16,822 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash 935766288, now seen corresponding path program 17 times [2021-07-09 18:43:16,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:16,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793981437] [2021-07-09 18:43:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:17,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:17,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793981437] [2021-07-09 18:43:17,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793981437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032943568] [2021-07-09 18:43:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:17,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:17,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:43:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:17,325 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 18:43:17,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:17,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:17,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:17,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:17,546 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 18:43:17,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:17,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:17,557 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 18:43:17,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032943568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755665843] [2021-07-09 18:43:17,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:17,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:17,974 INFO L87 Difference]: Start difference. First operand 7087 states and 21525 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:20,340 INFO L93 Difference]: Finished difference Result 9239 states and 27794 transitions. [2021-07-09 18:43:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:20,356 INFO L225 Difference]: With dead ends: 9239 [2021-07-09 18:43:20,356 INFO L226 Difference]: Without dead ends: 9204 [2021-07-09 18:43:20,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2211.5ms TimeCoverageRelationStatistics Valid=308, Invalid=4248, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:43:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9204 states. [2021-07-09 18:43:20,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9204 to 7091. [2021-07-09 18:43:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7091 states, 7090 states have (on average 3.0370944992947813) internal successors, (21533), 7090 states have internal predecessors, (21533), 0 states have call successors, (0), 0 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 18:43:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7091 states to 7091 states and 21533 transitions. [2021-07-09 18:43:20,476 INFO L78 Accepts]: Start accepts. Automaton has 7091 states and 21533 transitions. Word has length 48 [2021-07-09 18:43:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:20,477 INFO L482 AbstractCegarLoop]: Abstraction has 7091 states and 21533 transitions. [2021-07-09 18:43:20,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7091 states and 21533 transitions. [2021-07-09 18:43:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:20,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:20,485 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:20,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 18:43:20,686 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:20,686 INFO L82 PathProgramCache]: Analyzing trace with hash 328328528, now seen corresponding path program 18 times [2021-07-09 18:43:20,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:20,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484284405] [2021-07-09 18:43:20,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:21,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484284405] [2021-07-09 18:43:21,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484284405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:21,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315983995] [2021-07-09 18:43:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:21,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:43:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:21,199 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 18:43:21,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:21,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:21,210 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 18:43:21,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:21,464 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 18:43:21,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:21,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:21,477 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 18:43:21,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315983995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:43:21,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452792495] [2021-07-09 18:43:21,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:43:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:43:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:43:21,953 INFO L87 Difference]: Start difference. First operand 7091 states and 21533 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:43:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:24,379 INFO L93 Difference]: Finished difference Result 9243 states and 27800 transitions. [2021-07-09 18:43:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:43:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:43:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:24,395 INFO L225 Difference]: With dead ends: 9243 [2021-07-09 18:43:24,395 INFO L226 Difference]: Without dead ends: 9198 [2021-07-09 18:43:24,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 2333.3ms TimeCoverageRelationStatistics Valid=350, Invalid=4762, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:43:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9198 states. [2021-07-09 18:43:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9198 to 7085. [2021-07-09 18:43:24,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.0378317334839076) internal successors, (21520), 7084 states have internal predecessors, (21520), 0 states have call successors, (0), 0 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 18:43:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 21520 transitions. [2021-07-09 18:43:24,532 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 21520 transitions. Word has length 48 [2021-07-09 18:43:24,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:24,532 INFO L482 AbstractCegarLoop]: Abstraction has 7085 states and 21520 transitions. [2021-07-09 18:43:24,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:43:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 21520 transitions. [2021-07-09 18:43:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:24,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:24,542 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:24,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:43:24,743 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 865491300, now seen corresponding path program 19 times [2021-07-09 18:43:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:24,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707643909] [2021-07-09 18:43:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707643909] [2021-07-09 18:43:25,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707643909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336386742] [2021-07-09 18:43:25,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:25,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:25,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:25,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:25,285 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 18:43:25,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:43:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:25,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:25,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:25,478 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 18:43:25,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:25,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336386742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:25,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:25,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:25,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106070780] [2021-07-09 18:43:25,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:25,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:25,916 INFO L87 Difference]: Start difference. First operand 7085 states and 21520 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:28,418 INFO L93 Difference]: Finished difference Result 8135 states and 24594 transitions. [2021-07-09 18:43:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:43:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:28,433 INFO L225 Difference]: With dead ends: 8135 [2021-07-09 18:43:28,433 INFO L226 Difference]: Without dead ends: 8082 [2021-07-09 18:43:28,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2484.1ms TimeCoverageRelationStatistics Valid=364, Invalid=4606, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:43:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-07-09 18:43:28,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 7093. [2021-07-09 18:43:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 7092 states have (on average 3.036379018612521) internal successors, (21534), 7092 states have internal predecessors, (21534), 0 states have call successors, (0), 0 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 18:43:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 21534 transitions. [2021-07-09 18:43:28,537 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 21534 transitions. Word has length 48 [2021-07-09 18:43:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:28,537 INFO L482 AbstractCegarLoop]: Abstraction has 7093 states and 21534 transitions. [2021-07-09 18:43:28,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 21534 transitions. [2021-07-09 18:43:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:28,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:28,546 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:28,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:28,747 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash -10691164, now seen corresponding path program 20 times [2021-07-09 18:43:28,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:28,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611968418] [2021-07-09 18:43:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611968418] [2021-07-09 18:43:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611968418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690511779] [2021-07-09 18:43:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:29,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:29,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:29,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:29,242 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 18:43:29,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:29,254 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 18:43:29,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:29,435 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 18:43:29,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:29,447 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 18:43:29,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690511779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:29,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:29,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510976476] [2021-07-09 18:43:29,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:29,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:29,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:29,862 INFO L87 Difference]: Start difference. First operand 7093 states and 21534 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:32,108 INFO L93 Difference]: Finished difference Result 9241 states and 27793 transitions. [2021-07-09 18:43:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:32,145 INFO L225 Difference]: With dead ends: 9241 [2021-07-09 18:43:32,146 INFO L226 Difference]: Without dead ends: 9198 [2021-07-09 18:43:32,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2144.8ms TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:43:32,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9198 states. [2021-07-09 18:43:32,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9198 to 7085. [2021-07-09 18:43:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7085 states, 7084 states have (on average 3.037690570299266) internal successors, (21519), 7084 states have internal predecessors, (21519), 0 states have call successors, (0), 0 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 18:43:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 21519 transitions. [2021-07-09 18:43:32,252 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 21519 transitions. Word has length 48 [2021-07-09 18:43:32,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:32,252 INFO L482 AbstractCegarLoop]: Abstraction has 7085 states and 21519 transitions. [2021-07-09 18:43:32,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:32,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 21519 transitions. [2021-07-09 18:43:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:32,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:32,262 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:32,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:32,463 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:32,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1290605100, now seen corresponding path program 21 times [2021-07-09 18:43:32,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:32,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173639562] [2021-07-09 18:43:32,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:32,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:32,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173639562] [2021-07-09 18:43:32,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173639562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:32,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624020206] [2021-07-09 18:43:32,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:32,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:43:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:43:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:32,975 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 18:43:32,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:32,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:32,987 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 18:43:32,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:33,170 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 18:43:33,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:33,182 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 18:43:33,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624020206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:33,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:33,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214477165] [2021-07-09 18:43:33,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:33,602 INFO L87 Difference]: Start difference. First operand 7085 states and 21519 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:36,180 INFO L93 Difference]: Finished difference Result 8143 states and 24611 transitions. [2021-07-09 18:43:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:43:36,180 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:36,193 INFO L225 Difference]: With dead ends: 8143 [2021-07-09 18:43:36,194 INFO L226 Difference]: Without dead ends: 8090 [2021-07-09 18:43:36,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2577.9ms TimeCoverageRelationStatistics Valid=364, Invalid=4606, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:43:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8090 states. [2021-07-09 18:43:36,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8090 to 7097. [2021-07-09 18:43:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 3.036217587373168) internal successors, (21545), 7096 states have internal predecessors, (21545), 0 states have call successors, (0), 0 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 18:43:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 21545 transitions. [2021-07-09 18:43:36,304 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 21545 transitions. Word has length 48 [2021-07-09 18:43:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:36,305 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 21545 transitions. [2021-07-09 18:43:36,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:36,305 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 21545 transitions. [2021-07-09 18:43:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:36,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:36,314 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:36,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:36,514 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:36,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 473064830, now seen corresponding path program 22 times [2021-07-09 18:43:36,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:36,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574053347] [2021-07-09 18:43:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:36,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:36,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574053347] [2021-07-09 18:43:36,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574053347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:36,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468040156] [2021-07-09 18:43:36,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:36,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:43:36,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:36,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:37,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:37,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:37,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:37,051 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 18:43:37,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:43:37,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:37,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:37,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:37,243 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 18:43:37,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:37,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468040156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:37,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:37,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309074363] [2021-07-09 18:43:37,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:37,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:37,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:37,657 INFO L87 Difference]: Start difference. First operand 7097 states and 21545 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:39,926 INFO L93 Difference]: Finished difference Result 9249 states and 27812 transitions. [2021-07-09 18:43:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:39,927 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:39,943 INFO L225 Difference]: With dead ends: 9249 [2021-07-09 18:43:39,943 INFO L226 Difference]: Without dead ends: 9196 [2021-07-09 18:43:39,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2184.2ms TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:43:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9196 states. [2021-07-09 18:43:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9196 to 7083. [2021-07-09 18:43:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0378424173962157) internal successors, (21514), 7082 states have internal predecessors, (21514), 0 states have call successors, (0), 0 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 18:43:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21514 transitions. [2021-07-09 18:43:40,064 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21514 transitions. Word has length 48 [2021-07-09 18:43:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:40,064 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21514 transitions. [2021-07-09 18:43:40,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21514 transitions. [2021-07-09 18:43:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:40,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:40,074 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:40,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:40,274 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash -72633422, now seen corresponding path program 23 times [2021-07-09 18:43:40,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:40,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448233253] [2021-07-09 18:43:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:40,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448233253] [2021-07-09 18:43:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448233253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518845971] [2021-07-09 18:43:40,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:40,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:43:40,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:43:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:40,826 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 18:43:40,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:40,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:40,837 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 18:43:40,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:41,018 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 18:43:41,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:41,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:41,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:41,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:41,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518845971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:41,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:41,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:41,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56339527] [2021-07-09 18:43:41,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:41,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:41,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:41,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:41,452 INFO L87 Difference]: Start difference. First operand 7083 states and 21514 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:44,094 INFO L93 Difference]: Finished difference Result 8116 states and 24546 transitions. [2021-07-09 18:43:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:43:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:44,109 INFO L225 Difference]: With dead ends: 8116 [2021-07-09 18:43:44,109 INFO L226 Difference]: Without dead ends: 8076 [2021-07-09 18:43:44,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2507.3ms TimeCoverageRelationStatistics Valid=364, Invalid=4606, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:43:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-07-09 18:43:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 7087. [2021-07-09 18:43:44,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 3.037115438893593) internal successors, (21521), 7086 states have internal predecessors, (21521), 0 states have call successors, (0), 0 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 18:43:44,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 21521 transitions. [2021-07-09 18:43:44,217 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 21521 transitions. Word has length 48 [2021-07-09 18:43:44,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:44,217 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 21521 transitions. [2021-07-09 18:43:44,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 21521 transitions. [2021-07-09 18:43:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:44,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:44,227 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:44,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:43:44,431 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash -948815886, now seen corresponding path program 24 times [2021-07-09 18:43:44,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:44,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595024479] [2021-07-09 18:43:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:44,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:44,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595024479] [2021-07-09 18:43:44,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595024479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:44,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236131682] [2021-07-09 18:43:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:44,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:44,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:44,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:43:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:44,979 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 18:43:44,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:44,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:44,991 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 18:43:44,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:45,245 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 18:43:45,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:45,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:45,257 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 18:43:45,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:43:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:45,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236131682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:45,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:45,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:43:45,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344404948] [2021-07-09 18:43:45,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:43:45,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:43:45,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:43:45,660 INFO L87 Difference]: Start difference. First operand 7087 states and 21521 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:43:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:48,156 INFO L93 Difference]: Finished difference Result 9235 states and 27780 transitions. [2021-07-09 18:43:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:43:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:43:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:48,172 INFO L225 Difference]: With dead ends: 9235 [2021-07-09 18:43:48,172 INFO L226 Difference]: Without dead ends: 9188 [2021-07-09 18:43:48,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 2318.1ms TimeCoverageRelationStatistics Valid=356, Invalid=4900, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:43:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9188 states. [2021-07-09 18:43:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9188 to 7075. [2021-07-09 18:43:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7075 states, 7074 states have (on average 3.039157478088776) internal successors, (21499), 7074 states have internal predecessors, (21499), 0 states have call successors, (0), 0 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 18:43:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 21499 transitions. [2021-07-09 18:43:48,295 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 21499 transitions. Word has length 48 [2021-07-09 18:43:48,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:48,295 INFO L482 AbstractCegarLoop]: Abstraction has 7075 states and 21499 transitions. [2021-07-09 18:43:48,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:43:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 21499 transitions. [2021-07-09 18:43:48,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:48,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:48,305 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:48,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:43:48,517 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 920693008, now seen corresponding path program 25 times [2021-07-09 18:43:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:48,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349116637] [2021-07-09 18:43:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:48,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:48,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349116637] [2021-07-09 18:43:48,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349116637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:48,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18013662] [2021-07-09 18:43:48,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:48,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:49,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:49,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:49,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:49,068 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 18:43:49,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:43:49,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:49,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:49,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:49,258 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 18:43:49,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:49,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18013662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:49,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:49,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:49,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958374929] [2021-07-09 18:43:49,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:49,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:49,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:49,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:49,687 INFO L87 Difference]: Start difference. First operand 7075 states and 21499 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:52,420 INFO L93 Difference]: Finished difference Result 8114 states and 24544 transitions. [2021-07-09 18:43:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:43:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:52,434 INFO L225 Difference]: With dead ends: 8114 [2021-07-09 18:43:52,435 INFO L226 Difference]: Without dead ends: 8074 [2021-07-09 18:43:52,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 2538.8ms TimeCoverageRelationStatistics Valid=364, Invalid=4606, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:43:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2021-07-09 18:43:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7081. [2021-07-09 18:43:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7081 states, 7080 states have (on average 3.0384180790960453) internal successors, (21512), 7080 states have internal predecessors, (21512), 0 states have call successors, (0), 0 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 18:43:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7081 states to 7081 states and 21512 transitions. [2021-07-09 18:43:52,546 INFO L78 Accepts]: Start accepts. Automaton has 7081 states and 21512 transitions. Word has length 48 [2021-07-09 18:43:52,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:52,546 INFO L482 AbstractCegarLoop]: Abstraction has 7081 states and 21512 transitions. [2021-07-09 18:43:52,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 7081 states and 21512 transitions. [2021-07-09 18:43:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:52,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:52,556 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:52,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:43:52,757 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1610604358, now seen corresponding path program 26 times [2021-07-09 18:43:52,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:52,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774648719] [2021-07-09 18:43:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:53,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:53,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774648719] [2021-07-09 18:43:53,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774648719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:53,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798081649] [2021-07-09 18:43:53,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:53,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:53,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:53,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:53,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:53,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:53,308 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 18:43:53,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:43:53,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:53,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:53,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:53,507 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 18:43:53,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:53,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798081649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:53,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:53,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:53,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546196990] [2021-07-09 18:43:53,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:53,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:53,909 INFO L87 Difference]: Start difference. First operand 7081 states and 21512 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:55,968 INFO L93 Difference]: Finished difference Result 9233 states and 27779 transitions. [2021-07-09 18:43:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:55,968 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:55,984 INFO L225 Difference]: With dead ends: 9233 [2021-07-09 18:43:55,984 INFO L226 Difference]: Without dead ends: 9145 [2021-07-09 18:43:55,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2197.5ms TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:43:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2021-07-09 18:43:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 7032. [2021-07-09 18:43:56,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7032 states, 7031 states have (on average 3.044801592945527) internal successors, (21408), 7031 states have internal predecessors, (21408), 0 states have call successors, (0), 0 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 18:43:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7032 states to 7032 states and 21408 transitions. [2021-07-09 18:43:56,104 INFO L78 Accepts]: Start accepts. Automaton has 7032 states and 21408 transitions. Word has length 48 [2021-07-09 18:43:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:56,104 INFO L482 AbstractCegarLoop]: Abstraction has 7032 states and 21408 transitions. [2021-07-09 18:43:56,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 7032 states and 21408 transitions. [2021-07-09 18:43:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:56,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:56,113 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:43:56,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:56,313 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:56,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:56,314 INFO L82 PathProgramCache]: Analyzing trace with hash 744174910, now seen corresponding path program 27 times [2021-07-09 18:43:56,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:56,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32541394] [2021-07-09 18:43:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:56,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:56,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32541394] [2021-07-09 18:43:56,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32541394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:56,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272152032] [2021-07-09 18:43:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:56,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:43:56,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:43:56,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:56,812 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 18:43:56,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:56,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:56,824 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 18:43:56,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:43:57,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:43:57,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:57,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:57,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:43:57,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:43:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272152032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:57,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:57,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:43:57,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852417901] [2021-07-09 18:43:57,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:43:57,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:57,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:43:57,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:43:57,444 INFO L87 Difference]: Start difference. First operand 7032 states and 21408 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:59,723 INFO L93 Difference]: Finished difference Result 9458 states and 28404 transitions. [2021-07-09 18:43:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:43:59,723 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:43:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:59,739 INFO L225 Difference]: With dead ends: 9458 [2021-07-09 18:43:59,739 INFO L226 Difference]: Without dead ends: 9314 [2021-07-09 18:43:59,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2224.9ms TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:43:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9314 states. [2021-07-09 18:43:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9314 to 7098. [2021-07-09 18:43:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 7097 states have (on average 3.040721431590813) internal successors, (21580), 7097 states have internal predecessors, (21580), 0 states have call successors, (0), 0 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 18:43:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 21580 transitions. [2021-07-09 18:43:59,854 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 21580 transitions. Word has length 48 [2021-07-09 18:43:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:59,854 INFO L482 AbstractCegarLoop]: Abstraction has 7098 states and 21580 transitions. [2021-07-09 18:43:59,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:43:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 21580 transitions. [2021-07-09 18:43:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:43:59,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:59,863 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:00,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 18:44:00,065 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash 851625278, now seen corresponding path program 28 times [2021-07-09 18:44:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:00,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509496256] [2021-07-09 18:44:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:00,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:00,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509496256] [2021-07-09 18:44:00,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509496256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:00,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584709430] [2021-07-09 18:44:00,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:00,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:00,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:00,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:00,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:00,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:00,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:00,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:00,575 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 18:44:00,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:44:00,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:00,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:00,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:00,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:00,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:01,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584709430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:01,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:01,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:01,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050296457] [2021-07-09 18:44:01,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:01,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:01,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:01,218 INFO L87 Difference]: Start difference. First operand 7098 states and 21580 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:03,924 INFO L93 Difference]: Finished difference Result 8160 states and 24665 transitions. [2021-07-09 18:44:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:44:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:03,938 INFO L225 Difference]: With dead ends: 8160 [2021-07-09 18:44:03,938 INFO L226 Difference]: Without dead ends: 8120 [2021-07-09 18:44:03,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2530.2ms TimeCoverageRelationStatistics Valid=361, Invalid=4609, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:44:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8120 states. [2021-07-09 18:44:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8120 to 7155. [2021-07-09 18:44:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.035225048923679) internal successors, (21714), 7154 states have internal predecessors, (21714), 0 states have call successors, (0), 0 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 18:44:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21714 transitions. [2021-07-09 18:44:04,041 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21714 transitions. Word has length 48 [2021-07-09 18:44:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:04,041 INFO L482 AbstractCegarLoop]: Abstraction has 7155 states and 21714 transitions. [2021-07-09 18:44:04,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21714 transitions. [2021-07-09 18:44:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:04,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:04,050 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:04,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:04,251 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:04,251 INFO L82 PathProgramCache]: Analyzing trace with hash -24557186, now seen corresponding path program 29 times [2021-07-09 18:44:04,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:04,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255010574] [2021-07-09 18:44:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:04,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:04,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255010574] [2021-07-09 18:44:04,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255010574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:04,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386292992] [2021-07-09 18:44:04,647 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:04,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:04,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:44:04,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:04,771 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 18:44:04,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:04,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:04,784 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 18:44:04,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:04,964 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 18:44:04,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:04,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:04,976 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 18:44:04,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:05,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386292992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:05,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:05,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:05,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145514289] [2021-07-09 18:44:05,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:05,401 INFO L87 Difference]: Start difference. First operand 7155 states and 21714 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:07,786 INFO L93 Difference]: Finished difference Result 9387 states and 28215 transitions. [2021-07-09 18:44:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:44:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:07,802 INFO L225 Difference]: With dead ends: 9387 [2021-07-09 18:44:07,802 INFO L226 Difference]: Without dead ends: 9348 [2021-07-09 18:44:07,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2202.3ms TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:44:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9348 states. [2021-07-09 18:44:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9348 to 7151. [2021-07-09 18:44:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7151 states, 7150 states have (on average 3.0353846153846153) internal successors, (21703), 7150 states have internal predecessors, (21703), 0 states have call successors, (0), 0 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 18:44:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7151 states to 7151 states and 21703 transitions. [2021-07-09 18:44:07,924 INFO L78 Accepts]: Start accepts. Automaton has 7151 states and 21703 transitions. Word has length 48 [2021-07-09 18:44:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:07,924 INFO L482 AbstractCegarLoop]: Abstraction has 7151 states and 21703 transitions. [2021-07-09 18:44:07,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7151 states and 21703 transitions. [2021-07-09 18:44:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:07,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:07,935 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:08,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:44:08,136 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:08,136 INFO L82 PathProgramCache]: Analyzing trace with hash 117157954, now seen corresponding path program 30 times [2021-07-09 18:44:08,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:08,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625589296] [2021-07-09 18:44:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:08,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:08,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625589296] [2021-07-09 18:44:08,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625589296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:08,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445992639] [2021-07-09 18:44:08,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:08,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:08,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:08,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:44:08,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:44:08,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:08,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:08,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:08,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:08,898 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 18:44:08,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:08,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:08,911 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 18:44:08,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:09,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445992639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:09,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:09,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:09,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408375380] [2021-07-09 18:44:09,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:09,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:09,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:09,334 INFO L87 Difference]: Start difference. First operand 7151 states and 21703 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:12,008 INFO L93 Difference]: Finished difference Result 9490 states and 28434 transitions. [2021-07-09 18:44:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:44:12,008 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:12,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:12,023 INFO L225 Difference]: With dead ends: 9490 [2021-07-09 18:44:12,023 INFO L226 Difference]: Without dead ends: 9433 [2021-07-09 18:44:12,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2312.3ms TimeCoverageRelationStatistics Valid=309, Invalid=4247, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:44:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9433 states. [2021-07-09 18:44:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9433 to 7157. [2021-07-09 18:44:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7156 states have (on average 3.0346562325321407) internal successors, (21716), 7156 states have internal predecessors, (21716), 0 states have call successors, (0), 0 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 18:44:12,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 21716 transitions. [2021-07-09 18:44:12,140 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 21716 transitions. Word has length 48 [2021-07-09 18:44:12,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:12,140 INFO L482 AbstractCegarLoop]: Abstraction has 7157 states and 21716 transitions. [2021-07-09 18:44:12,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 21716 transitions. [2021-07-09 18:44:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:12,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:12,149 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:12,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:12,350 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:12,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1165989506, now seen corresponding path program 31 times [2021-07-09 18:44:12,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:12,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065236932] [2021-07-09 18:44:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:12,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065236932] [2021-07-09 18:44:12,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065236932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:12,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280788021] [2021-07-09 18:44:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:12,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:12,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:12,895 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 18:44:12,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:44:13,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:13,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:13,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:13,083 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 18:44:13,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:13,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280788021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:13,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:13,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:13,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699229550] [2021-07-09 18:44:13,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:13,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:13,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:13,472 INFO L87 Difference]: Start difference. First operand 7157 states and 21716 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:15,958 INFO L93 Difference]: Finished difference Result 9445 states and 28338 transitions. [2021-07-09 18:44:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:44:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:15,974 INFO L225 Difference]: With dead ends: 9445 [2021-07-09 18:44:15,974 INFO L226 Difference]: Without dead ends: 9351 [2021-07-09 18:44:15,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2250.6ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:44:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9351 states. [2021-07-09 18:44:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9351 to 7137. [2021-07-09 18:44:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7137 states, 7136 states have (on average 3.037135650224215) internal successors, (21673), 7136 states have internal predecessors, (21673), 0 states have call successors, (0), 0 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 18:44:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7137 states to 7137 states and 21673 transitions. [2021-07-09 18:44:16,105 INFO L78 Accepts]: Start accepts. Automaton has 7137 states and 21673 transitions. Word has length 48 [2021-07-09 18:44:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:16,105 INFO L482 AbstractCegarLoop]: Abstraction has 7137 states and 21673 transitions. [2021-07-09 18:44:16,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 7137 states and 21673 transitions. [2021-07-09 18:44:16,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:16,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:16,114 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:16,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:16,315 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash 496617304, now seen corresponding path program 32 times [2021-07-09 18:44:16,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:16,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246774504] [2021-07-09 18:44:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:16,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246774504] [2021-07-09 18:44:16,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246774504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:16,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146017043] [2021-07-09 18:44:16,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:16,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:16,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:16,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:16,840 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 18:44:16,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:44:17,025 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 18:44:17,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:17,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:17,036 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 18:44:17,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:17,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146017043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:17,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:17,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:44:17,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796932509] [2021-07-09 18:44:17,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:44:17,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:17,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:44:17,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:44:17,509 INFO L87 Difference]: Start difference. First operand 7137 states and 21673 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:44:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:20,393 INFO L93 Difference]: Finished difference Result 9619 states and 28817 transitions. [2021-07-09 18:44:20,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:44:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:44:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:20,409 INFO L225 Difference]: With dead ends: 9619 [2021-07-09 18:44:20,409 INFO L226 Difference]: Without dead ends: 9488 [2021-07-09 18:44:20,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2442.0ms TimeCoverageRelationStatistics Valid=375, Invalid=5325, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:44:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9488 states. [2021-07-09 18:44:20,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9488 to 7197. [2021-07-09 18:44:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7197 states, 7196 states have (on average 3.03071150639244) internal successors, (21809), 7196 states have internal predecessors, (21809), 0 states have call successors, (0), 0 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 18:44:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7197 states to 7197 states and 21809 transitions. [2021-07-09 18:44:20,532 INFO L78 Accepts]: Start accepts. Automaton has 7197 states and 21809 transitions. Word has length 48 [2021-07-09 18:44:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:20,532 INFO L482 AbstractCegarLoop]: Abstraction has 7197 states and 21809 transitions. [2021-07-09 18:44:20,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:44:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7197 states and 21809 transitions. [2021-07-09 18:44:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:20,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:20,541 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:20,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-09 18:44:20,742 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 522686180, now seen corresponding path program 33 times [2021-07-09 18:44:20,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:20,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814753516] [2021-07-09 18:44:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:21,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:21,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814753516] [2021-07-09 18:44:21,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814753516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606272733] [2021-07-09 18:44:21,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:21,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:44:21,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:21,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:21,261 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 18:44:21,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:21,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:21,273 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 18:44:21,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:21,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:21,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:21,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:21,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:21,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:21,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606272733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:21,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:21,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523820951] [2021-07-09 18:44:21,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:21,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:21,886 INFO L87 Difference]: Start difference. First operand 7197 states and 21809 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:24,717 INFO L93 Difference]: Finished difference Result 8284 states and 24948 transitions. [2021-07-09 18:44:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:44:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:24,731 INFO L225 Difference]: With dead ends: 8284 [2021-07-09 18:44:24,731 INFO L226 Difference]: Without dead ends: 8244 [2021-07-09 18:44:24,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2542.7ms TimeCoverageRelationStatistics Valid=349, Invalid=4481, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:44:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8244 states. [2021-07-09 18:44:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8244 to 7275. [2021-07-09 18:44:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 7274 states have (on average 3.0230959582073136) internal successors, (21990), 7274 states have internal predecessors, (21990), 0 states have call successors, (0), 0 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 18:44:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 21990 transitions. [2021-07-09 18:44:24,835 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 21990 transitions. Word has length 48 [2021-07-09 18:44:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:24,835 INFO L482 AbstractCegarLoop]: Abstraction has 7275 states and 21990 transitions. [2021-07-09 18:44:24,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:24,835 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 21990 transitions. [2021-07-09 18:44:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:24,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:24,845 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:25,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:44:25,046 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:25,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:25,046 INFO L82 PathProgramCache]: Analyzing trace with hash 293927336, now seen corresponding path program 34 times [2021-07-09 18:44:25,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:25,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428790463] [2021-07-09 18:44:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:25,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:25,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428790463] [2021-07-09 18:44:25,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428790463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:25,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644779405] [2021-07-09 18:44:25,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:25,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:25,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:25,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:25,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:25,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:25,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:25,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:44:25,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:25,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:25,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:25,750 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 18:44:25,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:26,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:26,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644779405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:26,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:26,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:26,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204434827] [2021-07-09 18:44:26,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:26,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:26,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:26,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:26,146 INFO L87 Difference]: Start difference. First operand 7275 states and 21990 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:28,414 INFO L93 Difference]: Finished difference Result 9493 states and 28451 transitions. [2021-07-09 18:44:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:44:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:28,431 INFO L225 Difference]: With dead ends: 9493 [2021-07-09 18:44:28,431 INFO L226 Difference]: Without dead ends: 9448 [2021-07-09 18:44:28,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 2167.5ms TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:44:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9448 states. [2021-07-09 18:44:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9448 to 7269. [2021-07-09 18:44:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7269 states, 7268 states have (on average 3.0229774353329666) internal successors, (21971), 7268 states have internal predecessors, (21971), 0 states have call successors, (0), 0 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 18:44:28,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7269 states to 7269 states and 21971 transitions. [2021-07-09 18:44:28,571 INFO L78 Accepts]: Start accepts. Automaton has 7269 states and 21971 transitions. Word has length 48 [2021-07-09 18:44:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:28,571 INFO L482 AbstractCegarLoop]: Abstraction has 7269 states and 21971 transitions. [2021-07-09 18:44:28,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7269 states and 21971 transitions. [2021-07-09 18:44:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:28,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:28,581 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:28,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:28,781 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -652804464, now seen corresponding path program 35 times [2021-07-09 18:44:28,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:28,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633116935] [2021-07-09 18:44:28,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:29,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:29,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633116935] [2021-07-09 18:44:29,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633116935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:29,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475254337] [2021-07-09 18:44:29,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:29,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:29,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:44:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:29,290 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 18:44:29,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:29,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:29,301 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 18:44:29,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:29,479 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 18:44:29,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:29,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:29,491 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 18:44:29,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:29,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475254337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:29,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:29,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:29,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177226148] [2021-07-09 18:44:29,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:29,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:29,888 INFO L87 Difference]: Start difference. First operand 7269 states and 21971 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:32,259 INFO L93 Difference]: Finished difference Result 9656 states and 28797 transitions. [2021-07-09 18:44:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:44:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:32,276 INFO L225 Difference]: With dead ends: 9656 [2021-07-09 18:44:32,276 INFO L226 Difference]: Without dead ends: 9597 [2021-07-09 18:44:32,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2093.4ms TimeCoverageRelationStatistics Valid=309, Invalid=4247, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:44:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9597 states. [2021-07-09 18:44:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 7275. [2021-07-09 18:44:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 7274 states have (on average 3.0222711025570526) internal successors, (21984), 7274 states have internal predecessors, (21984), 0 states have call successors, (0), 0 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 18:44:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 21984 transitions. [2021-07-09 18:44:32,402 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 21984 transitions. Word has length 48 [2021-07-09 18:44:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:32,402 INFO L482 AbstractCegarLoop]: Abstraction has 7275 states and 21984 transitions. [2021-07-09 18:44:32,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 21984 transitions. [2021-07-09 18:44:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:32,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:32,412 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:32,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:44:32,613 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:32,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:32,613 INFO L82 PathProgramCache]: Analyzing trace with hash -807241982, now seen corresponding path program 36 times [2021-07-09 18:44:32,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:32,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831952443] [2021-07-09 18:44:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:33,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831952443] [2021-07-09 18:44:33,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831952443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:33,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917871229] [2021-07-09 18:44:33,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:33,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:33,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:44:33,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:33,158 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 18:44:33,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:33,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:33,170 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 18:44:33,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:33,406 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 18:44:33,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:33,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:33,418 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 18:44:33,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:33,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917871229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:33,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:33,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:33,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730601732] [2021-07-09 18:44:33,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:33,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:33,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:33,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:33,816 INFO L87 Difference]: Start difference. First operand 7275 states and 21984 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:36,416 INFO L93 Difference]: Finished difference Result 9603 states and 28684 transitions. [2021-07-09 18:44:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:44:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:36,432 INFO L225 Difference]: With dead ends: 9603 [2021-07-09 18:44:36,433 INFO L226 Difference]: Without dead ends: 9447 [2021-07-09 18:44:36,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2341.2ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:44:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-07-09 18:44:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 7209. [2021-07-09 18:44:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7208 states have (on average 3.02649833518313) internal successors, (21815), 7208 states have internal predecessors, (21815), 0 states have call successors, (0), 0 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 18:44:36,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 21815 transitions. [2021-07-09 18:44:36,553 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 21815 transitions. Word has length 48 [2021-07-09 18:44:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:36,553 INFO L482 AbstractCegarLoop]: Abstraction has 7209 states and 21815 transitions. [2021-07-09 18:44:36,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 21815 transitions. [2021-07-09 18:44:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:36,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:36,562 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:36,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:36,763 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1964337944, now seen corresponding path program 37 times [2021-07-09 18:44:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:36,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437633758] [2021-07-09 18:44:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:37,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:37,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437633758] [2021-07-09 18:44:37,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437633758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:37,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540636204] [2021-07-09 18:44:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:37,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:37,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:37,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:37,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:37,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:37,333 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 18:44:37,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:44:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:37,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:37,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:37,538 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 18:44:37,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:37,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540636204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:37,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:37,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188356346] [2021-07-09 18:44:37,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:37,972 INFO L87 Difference]: Start difference. First operand 7209 states and 21815 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:40,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:40,717 INFO L93 Difference]: Finished difference Result 8226 states and 24795 transitions. [2021-07-09 18:44:40,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:44:40,717 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:40,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:40,731 INFO L225 Difference]: With dead ends: 8226 [2021-07-09 18:44:40,731 INFO L226 Difference]: Without dead ends: 8186 [2021-07-09 18:44:40,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2618.8ms TimeCoverageRelationStatistics Valid=377, Invalid=4453, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:44:40,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2021-07-09 18:44:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 7217. [2021-07-09 18:44:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7217 states, 7216 states have (on average 3.0257760532150777) internal successors, (21834), 7216 states have internal predecessors, (21834), 0 states have call successors, (0), 0 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 18:44:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7217 states to 7217 states and 21834 transitions. [2021-07-09 18:44:40,840 INFO L78 Accepts]: Start accepts. Automaton has 7217 states and 21834 transitions. Word has length 48 [2021-07-09 18:44:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:40,840 INFO L482 AbstractCegarLoop]: Abstraction has 7217 states and 21834 transitions. [2021-07-09 18:44:40,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7217 states and 21834 transitions. [2021-07-09 18:44:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:40,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:40,850 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:41,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:44:41,051 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1088155480, now seen corresponding path program 38 times [2021-07-09 18:44:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:41,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407739105] [2021-07-09 18:44:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:41,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407739105] [2021-07-09 18:44:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407739105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:41,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234627498] [2021-07-09 18:44:41,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:41,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:41,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:44:41,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:41,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:41,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:44:41,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:41,791 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 18:44:41,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:41,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:41,803 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 18:44:41,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234627498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:42,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:42,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:42,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11492772] [2021-07-09 18:44:42,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:42,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:42,208 INFO L87 Difference]: Start difference. First operand 7217 states and 21834 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:44,735 INFO L93 Difference]: Finished difference Result 8192 states and 24726 transitions. [2021-07-09 18:44:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:44:44,736 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:44,749 INFO L225 Difference]: With dead ends: 8192 [2021-07-09 18:44:44,750 INFO L226 Difference]: Without dead ends: 8153 [2021-07-09 18:44:44,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2419.0ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:44:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8153 states. [2021-07-09 18:44:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8153 to 7213. [2021-07-09 18:44:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 7212 states have (on average 3.026344980587909) internal successors, (21826), 7212 states have internal predecessors, (21826), 0 states have call successors, (0), 0 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 18:44:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 21826 transitions. [2021-07-09 18:44:44,853 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 21826 transitions. Word has length 48 [2021-07-09 18:44:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:44,853 INFO L482 AbstractCegarLoop]: Abstraction has 7213 states and 21826 transitions. [2021-07-09 18:44:44,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 21826 transitions. [2021-07-09 18:44:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:44,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:44,862 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:45,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:45,069 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1962764456, now seen corresponding path program 39 times [2021-07-09 18:44:45,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:45,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700996160] [2021-07-09 18:44:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:45,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700996160] [2021-07-09 18:44:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700996160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:45,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212449357] [2021-07-09 18:44:45,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:45,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:44:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:45,596 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 18:44:45,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:45,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:45,608 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 18:44:45,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:45,857 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 18:44:45,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:45,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:45,868 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 18:44:45,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:46,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212449357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:46,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:46,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-07-09 18:44:46,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139591975] [2021-07-09 18:44:46,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:44:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:44:46,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:44:46,372 INFO L87 Difference]: Start difference. First operand 7213 states and 21826 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:44:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:49,820 INFO L93 Difference]: Finished difference Result 9725 states and 29350 transitions. [2021-07-09 18:44:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:44:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:44:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:49,837 INFO L225 Difference]: With dead ends: 9725 [2021-07-09 18:44:49,837 INFO L226 Difference]: Without dead ends: 9685 [2021-07-09 18:44:49,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3121.5ms TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:44:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-07-09 18:44:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 7219. [2021-07-09 18:44:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 3.0256303685231365) internal successors, (21839), 7218 states have internal predecessors, (21839), 0 states have call successors, (0), 0 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 18:44:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 21839 transitions. [2021-07-09 18:44:49,955 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 21839 transitions. Word has length 48 [2021-07-09 18:44:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:49,955 INFO L482 AbstractCegarLoop]: Abstraction has 7219 states and 21839 transitions. [2021-07-09 18:44:49,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:44:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 21839 transitions. [2021-07-09 18:44:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:49,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:49,964 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:50,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:44:50,165 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:50,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:50,165 INFO L82 PathProgramCache]: Analyzing trace with hash -199094526, now seen corresponding path program 40 times [2021-07-09 18:44:50,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:50,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417906748] [2021-07-09 18:44:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:50,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:50,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417906748] [2021-07-09 18:44:50,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417906748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:50,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324741468] [2021-07-09 18:44:50,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:50,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:44:50,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:50,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:44:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:50,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:50,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:50,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:50,703 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 18:44:50,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:44:50,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:50,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:50,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:50,895 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 18:44:50,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324741468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:51,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:51,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:51,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933652444] [2021-07-09 18:44:51,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:51,301 INFO L87 Difference]: Start difference. First operand 7219 states and 21839 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:53,949 INFO L93 Difference]: Finished difference Result 8202 states and 24747 transitions. [2021-07-09 18:44:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:44:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:53,961 INFO L225 Difference]: With dead ends: 8202 [2021-07-09 18:44:53,961 INFO L226 Difference]: Without dead ends: 8157 [2021-07-09 18:44:53,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 2396.7ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:44:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8157 states. [2021-07-09 18:44:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8157 to 7213. [2021-07-09 18:44:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 7212 states have (on average 3.026067665002773) internal successors, (21824), 7212 states have internal predecessors, (21824), 0 states have call successors, (0), 0 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 18:44:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 21824 transitions. [2021-07-09 18:44:54,063 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 21824 transitions. Word has length 48 [2021-07-09 18:44:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:54,063 INFO L482 AbstractCegarLoop]: Abstraction has 7213 states and 21824 transitions. [2021-07-09 18:44:54,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 21824 transitions. [2021-07-09 18:44:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:54,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:54,072 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:54,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:44:54,273 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash -138798184, now seen corresponding path program 41 times [2021-07-09 18:44:54,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:54,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533734441] [2021-07-09 18:44:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:54,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533734441] [2021-07-09 18:44:54,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533734441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:54,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68305322] [2021-07-09 18:44:54,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:54,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:44:54,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:44:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:54,793 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 18:44:54,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:54,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:54,805 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 18:44:54,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:54,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:44:54,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:54,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:55,000 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 18:44:55,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:44:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68305322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:55,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:44:55,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349371092] [2021-07-09 18:44:55,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:44:55,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:44:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:44:55,401 INFO L87 Difference]: Start difference. First operand 7213 states and 21824 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:57,610 INFO L93 Difference]: Finished difference Result 9431 states and 28287 transitions. [2021-07-09 18:44:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:44:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:44:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:57,626 INFO L225 Difference]: With dead ends: 9431 [2021-07-09 18:44:57,627 INFO L226 Difference]: Without dead ends: 9396 [2021-07-09 18:44:57,627 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 2175.2ms TimeCoverageRelationStatistics Valid=311, Invalid=4245, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:44:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9396 states. [2021-07-09 18:44:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9396 to 7217. [2021-07-09 18:44:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7217 states, 7216 states have (on average 3.02549889135255) internal successors, (21832), 7216 states have internal predecessors, (21832), 0 states have call successors, (0), 0 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 18:44:57,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7217 states to 7217 states and 21832 transitions. [2021-07-09 18:44:57,743 INFO L78 Accepts]: Start accepts. Automaton has 7217 states and 21832 transitions. Word has length 48 [2021-07-09 18:44:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:57,743 INFO L482 AbstractCegarLoop]: Abstraction has 7217 states and 21832 transitions. [2021-07-09 18:44:57,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:44:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand 7217 states and 21832 transitions. [2021-07-09 18:44:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:44:57,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:57,782 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:44:57,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:57,983 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash -746235944, now seen corresponding path program 42 times [2021-07-09 18:44:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:57,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69952293] [2021-07-09 18:44:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:58,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:58,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69952293] [2021-07-09 18:44:58,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69952293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:58,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128320336] [2021-07-09 18:44:58,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:58,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:44:58,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:58,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:44:58,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:44:58,478 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 18:44:58,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:58,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:58,490 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 18:44:58,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:44:58,670 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 18:44:58,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:58,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:58,681 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 18:44:58,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:44:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:59,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128320336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:59,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:59,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:44:59,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920973064] [2021-07-09 18:44:59,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:44:59,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:59,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:44:59,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:44:59,163 INFO L87 Difference]: Start difference. First operand 7217 states and 21832 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:45:01,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:01,903 INFO L93 Difference]: Finished difference Result 9520 states and 28537 transitions. [2021-07-09 18:45:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:45:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:45:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:01,920 INFO L225 Difference]: With dead ends: 9520 [2021-07-09 18:45:01,920 INFO L226 Difference]: Without dead ends: 9475 [2021-07-09 18:45:01,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2413.8ms TimeCoverageRelationStatistics Valid=359, Invalid=5043, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:45:01,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9475 states. [2021-07-09 18:45:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9475 to 7211. [2021-07-09 18:45:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7210 states have (on average 3.0262135922330096) internal successors, (21819), 7210 states have internal predecessors, (21819), 0 states have call successors, (0), 0 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 18:45:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 21819 transitions. [2021-07-09 18:45:02,074 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 21819 transitions. Word has length 48 [2021-07-09 18:45:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:02,074 INFO L482 AbstractCegarLoop]: Abstraction has 7211 states and 21819 transitions. [2021-07-09 18:45:02,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:45:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 21819 transitions. [2021-07-09 18:45:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:02,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:02,084 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:02,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:02,284 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:02,284 INFO L82 PathProgramCache]: Analyzing trace with hash -209073172, now seen corresponding path program 43 times [2021-07-09 18:45:02,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:02,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589703024] [2021-07-09 18:45:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:02,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:02,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589703024] [2021-07-09 18:45:02,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589703024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:02,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326382481] [2021-07-09 18:45:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:02,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:02,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:02,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:02,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:02,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:02,814 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 18:45:02,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:03,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:03,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:03,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:03,017 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 18:45:03,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:03,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326382481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:03,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:03,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:03,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619540106] [2021-07-09 18:45:03,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:03,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:03,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:03,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:03,455 INFO L87 Difference]: Start difference. First operand 7211 states and 21819 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:06,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:06,223 INFO L93 Difference]: Finished difference Result 8237 states and 24819 transitions. [2021-07-09 18:45:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:45:06,224 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:06,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:06,238 INFO L225 Difference]: With dead ends: 8237 [2021-07-09 18:45:06,238 INFO L226 Difference]: Without dead ends: 8184 [2021-07-09 18:45:06,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 2631.9ms TimeCoverageRelationStatistics Valid=367, Invalid=4603, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:45:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2021-07-09 18:45:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 7219. [2021-07-09 18:45:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 3.024799113327792) internal successors, (21833), 7218 states have internal predecessors, (21833), 0 states have call successors, (0), 0 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 18:45:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 21833 transitions. [2021-07-09 18:45:06,346 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 21833 transitions. Word has length 48 [2021-07-09 18:45:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:06,346 INFO L482 AbstractCegarLoop]: Abstraction has 7219 states and 21833 transitions. [2021-07-09 18:45:06,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 21833 transitions. [2021-07-09 18:45:06,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:06,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:06,383 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:06,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:06,584 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:06,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1085255636, now seen corresponding path program 44 times [2021-07-09 18:45:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:06,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27023280] [2021-07-09 18:45:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:06,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:06,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27023280] [2021-07-09 18:45:06,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27023280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:06,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328152710] [2021-07-09 18:45:06,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:07,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:07,120 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 18:45:07,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:07,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:07,132 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 18:45:07,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:07,326 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 18:45:07,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:07,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:07,346 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 18:45:07,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:07,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328152710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:07,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:07,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:07,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240025501] [2021-07-09 18:45:07,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:07,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:07,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:07,763 INFO L87 Difference]: Start difference. First operand 7219 states and 21833 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:10,076 INFO L93 Difference]: Finished difference Result 9433 states and 28286 transitions. [2021-07-09 18:45:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:45:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:10,093 INFO L225 Difference]: With dead ends: 9433 [2021-07-09 18:45:10,093 INFO L226 Difference]: Without dead ends: 9390 [2021-07-09 18:45:10,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2269.7ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:45:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9390 states. [2021-07-09 18:45:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9390 to 7211. [2021-07-09 18:45:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7210 states have (on average 3.0260748959778088) internal successors, (21818), 7210 states have internal predecessors, (21818), 0 states have call successors, (0), 0 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 18:45:10,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 21818 transitions. [2021-07-09 18:45:10,223 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 21818 transitions. Word has length 48 [2021-07-09 18:45:10,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:10,223 INFO L482 AbstractCegarLoop]: Abstraction has 7211 states and 21818 transitions. [2021-07-09 18:45:10,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 21818 transitions. [2021-07-09 18:45:10,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:10,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:10,233 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:10,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:10,434 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:10,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1929797724, now seen corresponding path program 45 times [2021-07-09 18:45:10,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:10,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880646929] [2021-07-09 18:45:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:10,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:10,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880646929] [2021-07-09 18:45:10,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880646929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:10,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885288344] [2021-07-09 18:45:10,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:10,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:10,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:10,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:10,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:11,007 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 18:45:11,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:11,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:11,019 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 18:45:11,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:11,270 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 18:45:11,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:11,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:11,282 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 18:45:11,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885288344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:11,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:11,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-07-09 18:45:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969814452] [2021-07-09 18:45:11,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:45:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:45:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:45:11,783 INFO L87 Difference]: Start difference. First operand 7211 states and 21818 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:45:15,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:15,247 INFO L93 Difference]: Finished difference Result 9738 states and 29379 transitions. [2021-07-09 18:45:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:45:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:45:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:15,289 INFO L225 Difference]: With dead ends: 9738 [2021-07-09 18:45:15,289 INFO L226 Difference]: Without dead ends: 9685 [2021-07-09 18:45:15,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 3178.1ms TimeCoverageRelationStatistics Valid=480, Invalid=6162, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:45:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-07-09 18:45:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 7223. [2021-07-09 18:45:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7222 states have (on average 3.0246469122126833) internal successors, (21844), 7222 states have internal predecessors, (21844), 0 states have call successors, (0), 0 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 18:45:15,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 21844 transitions. [2021-07-09 18:45:15,406 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 21844 transitions. Word has length 48 [2021-07-09 18:45:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:15,406 INFO L482 AbstractCegarLoop]: Abstraction has 7223 states and 21844 transitions. [2021-07-09 18:45:15,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:45:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 21844 transitions. [2021-07-09 18:45:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:15,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:15,416 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:15,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:45:15,617 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:15,617 INFO L82 PathProgramCache]: Analyzing trace with hash -601499642, now seen corresponding path program 46 times [2021-07-09 18:45:15,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:15,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881022001] [2021-07-09 18:45:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:16,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:16,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:16,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881022001] [2021-07-09 18:45:16,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881022001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:16,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691036882] [2021-07-09 18:45:16,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:16,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:16,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:16,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:16,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:16,156 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 18:45:16,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:16,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:16,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:16,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:16,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691036882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:16,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:16,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626808317] [2021-07-09 18:45:16,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:16,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:16,826 INFO L87 Difference]: Start difference. First operand 7223 states and 21844 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:19,310 INFO L93 Difference]: Finished difference Result 9441 states and 28305 transitions. [2021-07-09 18:45:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:45:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:19,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:19,327 INFO L225 Difference]: With dead ends: 9441 [2021-07-09 18:45:19,327 INFO L226 Difference]: Without dead ends: 9388 [2021-07-09 18:45:19,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2420.3ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:45:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9388 states. [2021-07-09 18:45:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9388 to 7209. [2021-07-09 18:45:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7209 states, 7208 states have (on average 3.0262208657047727) internal successors, (21813), 7208 states have internal predecessors, (21813), 0 states have call successors, (0), 0 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 18:45:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7209 states to 7209 states and 21813 transitions. [2021-07-09 18:45:19,458 INFO L78 Accepts]: Start accepts. Automaton has 7209 states and 21813 transitions. Word has length 48 [2021-07-09 18:45:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:19,458 INFO L482 AbstractCegarLoop]: Abstraction has 7209 states and 21813 transitions. [2021-07-09 18:45:19,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7209 states and 21813 transitions. [2021-07-09 18:45:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:19,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:19,468 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:19,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:45:19,677 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1147197894, now seen corresponding path program 47 times [2021-07-09 18:45:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:19,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877647205] [2021-07-09 18:45:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:20,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:20,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877647205] [2021-07-09 18:45:20,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877647205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:20,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136927535] [2021-07-09 18:45:20,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:20,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:45:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:20,235 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 18:45:20,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:20,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:20,251 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 18:45:20,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:20,459 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 18:45:20,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:20,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:20,472 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 18:45:20,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136927535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:20,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:20,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:20,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028340607] [2021-07-09 18:45:20,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:20,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:20,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:20,921 INFO L87 Difference]: Start difference. First operand 7209 states and 21813 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:23,576 INFO L93 Difference]: Finished difference Result 8218 states and 24771 transitions. [2021-07-09 18:45:23,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:45:23,576 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:23,590 INFO L225 Difference]: With dead ends: 8218 [2021-07-09 18:45:23,590 INFO L226 Difference]: Without dead ends: 8178 [2021-07-09 18:45:23,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 2590.9ms TimeCoverageRelationStatistics Valid=367, Invalid=4603, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:45:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8178 states. [2021-07-09 18:45:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8178 to 7213. [2021-07-09 18:45:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 7212 states have (on average 3.0255130338325014) internal successors, (21820), 7212 states have internal predecessors, (21820), 0 states have call successors, (0), 0 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 18:45:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 21820 transitions. [2021-07-09 18:45:23,696 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 21820 transitions. Word has length 48 [2021-07-09 18:45:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:23,696 INFO L482 AbstractCegarLoop]: Abstraction has 7213 states and 21820 transitions. [2021-07-09 18:45:23,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 21820 transitions. [2021-07-09 18:45:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:23,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:23,706 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:23,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:45:23,910 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2023380358, now seen corresponding path program 48 times [2021-07-09 18:45:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:23,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530957061] [2021-07-09 18:45:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:24,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:24,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530957061] [2021-07-09 18:45:24,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530957061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:24,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329186450] [2021-07-09 18:45:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:24,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:24,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:24,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:45:24,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:24,477 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 18:45:24,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:24,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:24,489 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 18:45:24,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:24,676 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 18:45:24,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:24,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:24,688 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 18:45:24,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:25,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329186450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:25,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:25,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:25,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787528956] [2021-07-09 18:45:25,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:25,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:25,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:25,112 INFO L87 Difference]: Start difference. First operand 7213 states and 21820 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:27,393 INFO L93 Difference]: Finished difference Result 9427 states and 28273 transitions. [2021-07-09 18:45:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:45:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:27,411 INFO L225 Difference]: With dead ends: 9427 [2021-07-09 18:45:27,411 INFO L226 Difference]: Without dead ends: 9380 [2021-07-09 18:45:27,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2284.3ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:45:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9380 states. [2021-07-09 18:45:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9380 to 7201. [2021-07-09 18:45:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 3.0275) internal successors, (21798), 7200 states have internal predecessors, (21798), 0 states have call successors, (0), 0 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 18:45:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21798 transitions. [2021-07-09 18:45:27,536 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21798 transitions. Word has length 48 [2021-07-09 18:45:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:27,536 INFO L482 AbstractCegarLoop]: Abstraction has 7201 states and 21798 transitions. [2021-07-09 18:45:27,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21798 transitions. [2021-07-09 18:45:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:27,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:27,546 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:27,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:27,746 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:27,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:27,747 INFO L82 PathProgramCache]: Analyzing trace with hash -153871464, now seen corresponding path program 49 times [2021-07-09 18:45:27,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:27,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086871545] [2021-07-09 18:45:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:28,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086871545] [2021-07-09 18:45:28,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086871545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:28,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372610589] [2021-07-09 18:45:28,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:28,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:28,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:28,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:28,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:28,303 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 18:45:28,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:28,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:28,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:28,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:28,510 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 18:45:28,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372610589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:28,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:28,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:28,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370504650] [2021-07-09 18:45:28,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:28,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:28,926 INFO L87 Difference]: Start difference. First operand 7201 states and 21798 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:31,617 INFO L93 Difference]: Finished difference Result 8216 states and 24769 transitions. [2021-07-09 18:45:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:45:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:31,632 INFO L225 Difference]: With dead ends: 8216 [2021-07-09 18:45:31,632 INFO L226 Difference]: Without dead ends: 8176 [2021-07-09 18:45:31,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1237 ImplicationChecksByTransitivity, 2574.6ms TimeCoverageRelationStatistics Valid=367, Invalid=4603, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:45:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-07-09 18:45:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 7207. [2021-07-09 18:45:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7207 states, 7206 states have (on average 3.0267832361920624) internal successors, (21811), 7206 states have internal predecessors, (21811), 0 states have call successors, (0), 0 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 18:45:31,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7207 states to 7207 states and 21811 transitions. [2021-07-09 18:45:31,738 INFO L78 Accepts]: Start accepts. Automaton has 7207 states and 21811 transitions. Word has length 48 [2021-07-09 18:45:31,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:31,738 INFO L482 AbstractCegarLoop]: Abstraction has 7207 states and 21811 transitions. [2021-07-09 18:45:31,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:31,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7207 states and 21811 transitions. [2021-07-09 18:45:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:31,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:31,748 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:31,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 18:45:31,948 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1609798466, now seen corresponding path program 50 times [2021-07-09 18:45:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:31,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706308374] [2021-07-09 18:45:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:32,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706308374] [2021-07-09 18:45:32,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706308374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169839253] [2021-07-09 18:45:32,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:32,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:32,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:32,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:32,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:32,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:32,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:32,489 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 18:45:32,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:32,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:32,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:32,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:32,716 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 18:45:32,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:33,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169839253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:33,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:33,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882748806] [2021-07-09 18:45:33,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:33,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:33,114 INFO L87 Difference]: Start difference. First operand 7207 states and 21811 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:35,308 INFO L93 Difference]: Finished difference Result 9425 states and 28272 transitions. [2021-07-09 18:45:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:45:35,308 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:35,327 INFO L225 Difference]: With dead ends: 9425 [2021-07-09 18:45:35,328 INFO L226 Difference]: Without dead ends: 9337 [2021-07-09 18:45:35,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 2234.2ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:45:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9337 states. [2021-07-09 18:45:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9337 to 7149. [2021-07-09 18:45:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 3.0338556239507555) internal successors, (21686), 7148 states have internal predecessors, (21686), 0 states have call successors, (0), 0 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 18:45:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 21686 transitions. [2021-07-09 18:45:35,458 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 21686 transitions. Word has length 48 [2021-07-09 18:45:35,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:35,458 INFO L482 AbstractCegarLoop]: Abstraction has 7149 states and 21686 transitions. [2021-07-09 18:45:35,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:35,458 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 21686 transitions. [2021-07-09 18:45:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:35,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:35,467 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:35,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:35,676 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 286389664, now seen corresponding path program 51 times [2021-07-09 18:45:35,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:35,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158226226] [2021-07-09 18:45:35,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:36,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158226226] [2021-07-09 18:45:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158226226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:36,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817374021] [2021-07-09 18:45:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:36,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:36,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:36,195 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 18:45:36,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:36,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:36,207 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 18:45:36,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:36,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:36,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:36,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:45:36,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:36,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:36,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817374021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:36,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:36,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:36,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312750674] [2021-07-09 18:45:36,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:36,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:36,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:36,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:36,873 INFO L87 Difference]: Start difference. First operand 7149 states and 21686 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:38,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:38,916 INFO L93 Difference]: Finished difference Result 8102 states and 24496 transitions. [2021-07-09 18:45:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:45:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:38,928 INFO L225 Difference]: With dead ends: 8102 [2021-07-09 18:45:38,928 INFO L226 Difference]: Without dead ends: 8062 [2021-07-09 18:45:38,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2144.1ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:45:38,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8062 states. [2021-07-09 18:45:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8062 to 7161. [2021-07-09 18:45:39,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0328212290502794) internal successors, (21715), 7160 states have internal predecessors, (21715), 0 states have call successors, (0), 0 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 18:45:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21715 transitions. [2021-07-09 18:45:39,030 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21715 transitions. Word has length 48 [2021-07-09 18:45:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:39,030 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21715 transitions. [2021-07-09 18:45:39,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21715 transitions. [2021-07-09 18:45:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:39,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:39,040 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:39,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:39,240 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash -589792800, now seen corresponding path program 52 times [2021-07-09 18:45:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:39,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635819997] [2021-07-09 18:45:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:39,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635819997] [2021-07-09 18:45:39,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635819997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:39,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862160802] [2021-07-09 18:45:39,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:39,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:39,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:39,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:39,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:39,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:39,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:39,766 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 18:45:39,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:39,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:39,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:39,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:39,967 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 18:45:39,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862160802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:40,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:40,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793114876] [2021-07-09 18:45:40,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:40,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:40,365 INFO L87 Difference]: Start difference. First operand 7161 states and 21715 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:42,248 INFO L93 Difference]: Finished difference Result 9264 states and 27852 transitions. [2021-07-09 18:45:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:45:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:42,265 INFO L225 Difference]: With dead ends: 9264 [2021-07-09 18:45:42,265 INFO L226 Difference]: Without dead ends: 9225 [2021-07-09 18:45:42,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1822.7ms TimeCoverageRelationStatistics Valid=238, Invalid=3184, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:45:42,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9225 states. [2021-07-09 18:45:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9225 to 7157. [2021-07-09 18:45:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7156 states have (on average 3.032979318054779) internal successors, (21704), 7156 states have internal predecessors, (21704), 0 states have call successors, (0), 0 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 18:45:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 21704 transitions. [2021-07-09 18:45:42,381 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 21704 transitions. Word has length 48 [2021-07-09 18:45:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:42,381 INFO L482 AbstractCegarLoop]: Abstraction has 7157 states and 21704 transitions. [2021-07-09 18:45:42,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 21704 transitions. [2021-07-09 18:45:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:42,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:42,392 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:42,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:42,592 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash -448077660, now seen corresponding path program 53 times [2021-07-09 18:45:42,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:42,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806033468] [2021-07-09 18:45:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:42,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:42,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806033468] [2021-07-09 18:45:42,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806033468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:42,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284895297] [2021-07-09 18:45:42,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:43,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:45:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:43,128 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 18:45:43,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,139 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 18:45:43,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:43,317 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 18:45:43,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,329 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 18:45:43,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:43,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284895297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:43,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:43,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:43,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673805084] [2021-07-09 18:45:43,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:43,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:43,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:43,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:43,767 INFO L87 Difference]: Start difference. First operand 7157 states and 21704 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:45,480 INFO L93 Difference]: Finished difference Result 9448 states and 28297 transitions. [2021-07-09 18:45:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:45:45,480 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:45,496 INFO L225 Difference]: With dead ends: 9448 [2021-07-09 18:45:45,496 INFO L226 Difference]: Without dead ends: 9391 [2021-07-09 18:45:45,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1754.6ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:45:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2021-07-09 18:45:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 7163. [2021-07-09 18:45:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7163 states, 7162 states have (on average 3.032253560457973) internal successors, (21717), 7162 states have internal predecessors, (21717), 0 states have call successors, (0), 0 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 18:45:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 21717 transitions. [2021-07-09 18:45:45,615 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 21717 transitions. Word has length 48 [2021-07-09 18:45:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:45,615 INFO L482 AbstractCegarLoop]: Abstraction has 7163 states and 21717 transitions. [2021-07-09 18:45:45,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 21717 transitions. [2021-07-09 18:45:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:45,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:45,624 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:45,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:45,825 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1731225120, now seen corresponding path program 54 times [2021-07-09 18:45:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:45,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640435192] [2021-07-09 18:45:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:46,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640435192] [2021-07-09 18:45:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640435192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772267484] [2021-07-09 18:45:46,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:46,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:45:46,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:46,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:45:46,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:46,400 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 18:45:46,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:46,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:46,413 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 18:45:46,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:45:46,595 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 18:45:46,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:46,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:46,608 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 18:45:46,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:47,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772267484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:47,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:47,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:47,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709163066] [2021-07-09 18:45:47,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:47,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:47,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:47,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:47,007 INFO L87 Difference]: Start difference. First operand 7163 states and 21717 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:48,813 INFO L93 Difference]: Finished difference Result 9403 states and 28201 transitions. [2021-07-09 18:45:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:45:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:48,833 INFO L225 Difference]: With dead ends: 9403 [2021-07-09 18:45:48,833 INFO L226 Difference]: Without dead ends: 9309 [2021-07-09 18:45:48,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1811.6ms TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:45:48,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9309 states. [2021-07-09 18:45:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9309 to 7143. [2021-07-09 18:45:48,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 3.034724166900028) internal successors, (21674), 7142 states have internal predecessors, (21674), 0 states have call successors, (0), 0 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 18:45:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 21674 transitions. [2021-07-09 18:45:48,957 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 21674 transitions. Word has length 48 [2021-07-09 18:45:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:48,957 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 21674 transitions. [2021-07-09 18:45:48,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 21674 transitions. [2021-07-09 18:45:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:48,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:48,967 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:49,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:49,167 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:49,168 INFO L82 PathProgramCache]: Analyzing trace with hash -42549434, now seen corresponding path program 55 times [2021-07-09 18:45:49,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:49,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873061146] [2021-07-09 18:45:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:49,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873061146] [2021-07-09 18:45:49,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873061146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559953189] [2021-07-09 18:45:49,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:49,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:49,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:49,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:49,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:49,741 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 18:45:49,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:49,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:49,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:49,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:49,932 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 18:45:49,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559953189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:50,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:50,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:50,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360521026] [2021-07-09 18:45:50,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:50,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:50,340 INFO L87 Difference]: Start difference. First operand 7143 states and 21674 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:52,528 INFO L93 Difference]: Finished difference Result 8106 states and 24507 transitions. [2021-07-09 18:45:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:45:52,528 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:52,541 INFO L225 Difference]: With dead ends: 8106 [2021-07-09 18:45:52,541 INFO L226 Difference]: Without dead ends: 8066 [2021-07-09 18:45:52,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2067.8ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:45:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8066 states. [2021-07-09 18:45:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8066 to 7161. [2021-07-09 18:45:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0333798882681564) internal successors, (21719), 7160 states have internal predecessors, (21719), 0 states have call successors, (0), 0 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 18:45:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21719 transitions. [2021-07-09 18:45:52,639 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21719 transitions. Word has length 48 [2021-07-09 18:45:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:52,639 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21719 transitions. [2021-07-09 18:45:52,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21719 transitions. [2021-07-09 18:45:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:52,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:52,648 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:52,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 18:45:52,849 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:52,849 INFO L82 PathProgramCache]: Analyzing trace with hash -271308278, now seen corresponding path program 56 times [2021-07-09 18:45:52,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:52,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836487963] [2021-07-09 18:45:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:53,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:53,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836487963] [2021-07-09 18:45:53,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836487963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614842509] [2021-07-09 18:45:53,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:53,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:45:53,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:53,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:53,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:53,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:53,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:53,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:53,366 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 18:45:53,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:53,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:53,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:53,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:53,583 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 18:45:53,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:45:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:53,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614842509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:53,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:53,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:53,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002835442] [2021-07-09 18:45:53,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:53,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:53,987 INFO L87 Difference]: Start difference. First operand 7161 states and 21719 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:55,703 INFO L93 Difference]: Finished difference Result 9268 states and 27864 transitions. [2021-07-09 18:45:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:45:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:55,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:55,718 INFO L225 Difference]: With dead ends: 9268 [2021-07-09 18:45:55,718 INFO L226 Difference]: Without dead ends: 9223 [2021-07-09 18:45:55,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1814.0ms TimeCoverageRelationStatistics Valid=238, Invalid=3184, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:45:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9223 states. [2021-07-09 18:45:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9223 to 7155. [2021-07-09 18:45:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.0332681017612524) internal successors, (21700), 7154 states have internal predecessors, (21700), 0 states have call successors, (0), 0 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 18:45:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21700 transitions. [2021-07-09 18:45:55,834 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21700 transitions. Word has length 48 [2021-07-09 18:45:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:55,834 INFO L482 AbstractCegarLoop]: Abstraction has 7155 states and 21700 transitions. [2021-07-09 18:45:55,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21700 transitions. [2021-07-09 18:45:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:55,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:55,844 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:56,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:45:56,044 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1218040078, now seen corresponding path program 57 times [2021-07-09 18:45:56,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:56,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822003411] [2021-07-09 18:45:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:56,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822003411] [2021-07-09 18:45:56,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822003411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934675871] [2021-07-09 18:45:56,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:56,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:56,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:56,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:56,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:45:56,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:56,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:56,558 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 18:45:56,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:45:56,747 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 18:45:56,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:56,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:56,759 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 18:45:56,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:45:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:57,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934675871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:57,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:57,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:45:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064206265] [2021-07-09 18:45:57,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:45:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:57,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:45:57,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:45:57,147 INFO L87 Difference]: Start difference. First operand 7155 states and 21700 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:59,126 INFO L93 Difference]: Finished difference Result 9446 states and 28296 transitions. [2021-07-09 18:45:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:45:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:45:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:59,144 INFO L225 Difference]: With dead ends: 9446 [2021-07-09 18:45:59,144 INFO L226 Difference]: Without dead ends: 9387 [2021-07-09 18:45:59,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1724.3ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:45:59,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9387 states. [2021-07-09 18:45:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9387 to 7161. [2021-07-09 18:45:59,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0325418994413407) internal successors, (21713), 7160 states have internal predecessors, (21713), 0 states have call successors, (0), 0 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 18:45:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21713 transitions. [2021-07-09 18:45:59,275 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21713 transitions. Word has length 48 [2021-07-09 18:45:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:59,275 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21713 transitions. [2021-07-09 18:45:59,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:45:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21713 transitions. [2021-07-09 18:45:59,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:45:59,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:59,284 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:45:59,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-09 18:45:59,489 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1372477596, now seen corresponding path program 58 times [2021-07-09 18:45:59,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:59,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561699904] [2021-07-09 18:45:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:59,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:59,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561699904] [2021-07-09 18:45:59,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561699904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:59,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174008630] [2021-07-09 18:45:59,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:59,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:45:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:00,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:00,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:00,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:00,028 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 18:46:00,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:00,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:00,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:00,212 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 18:46:00,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174008630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:00,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:00,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:00,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366338979] [2021-07-09 18:46:00,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:00,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:00,599 INFO L87 Difference]: Start difference. First operand 7161 states and 21713 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:02,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:02,212 INFO L93 Difference]: Finished difference Result 9393 states and 28183 transitions. [2021-07-09 18:46:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:46:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:02,228 INFO L225 Difference]: With dead ends: 9393 [2021-07-09 18:46:02,228 INFO L226 Difference]: Without dead ends: 9237 [2021-07-09 18:46:02,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1721.5ms TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:46:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9237 states. [2021-07-09 18:46:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9237 to 7095. [2021-07-09 18:46:02,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7095 states, 7094 states have (on average 3.036932619114745) internal successors, (21544), 7094 states have internal predecessors, (21544), 0 states have call successors, (0), 0 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 18:46:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 21544 transitions. [2021-07-09 18:46:02,348 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 21544 transitions. Word has length 48 [2021-07-09 18:46:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:02,348 INFO L482 AbstractCegarLoop]: Abstraction has 7095 states and 21544 transitions. [2021-07-09 18:46:02,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 21544 transitions. [2021-07-09 18:46:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:02,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:02,357 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:02,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 18:46:02,558 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1399102330, now seen corresponding path program 59 times [2021-07-09 18:46:02,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:02,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778358115] [2021-07-09 18:46:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:02,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778358115] [2021-07-09 18:46:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778358115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:02,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409817052] [2021-07-09 18:46:02,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:02,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:02,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:46:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:03,071 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 18:46:03,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:03,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:03,083 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 18:46:03,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:03,265 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 18:46:03,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:03,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:03,277 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 18:46:03,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:03,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409817052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:03,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:03,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:03,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338129482] [2021-07-09 18:46:03,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:03,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:03,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:03,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:03,760 INFO L87 Difference]: Start difference. First operand 7095 states and 21544 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:05,945 INFO L93 Difference]: Finished difference Result 8048 states and 24354 transitions. [2021-07-09 18:46:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:05,945 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:05,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:05,958 INFO L225 Difference]: With dead ends: 8048 [2021-07-09 18:46:05,958 INFO L226 Difference]: Without dead ends: 8008 [2021-07-09 18:46:05,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2065.5ms TimeCoverageRelationStatistics Valid=283, Invalid=3257, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:46:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2021-07-09 18:46:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7103. [2021-07-09 18:46:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 3.0361869895803997) internal successors, (21563), 7102 states have internal predecessors, (21563), 0 states have call successors, (0), 0 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 18:46:06,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 21563 transitions. [2021-07-09 18:46:06,059 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 21563 transitions. Word has length 48 [2021-07-09 18:46:06,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:06,059 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 21563 transitions. [2021-07-09 18:46:06,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:06,059 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 21563 transitions. [2021-07-09 18:46:06,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:06,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:06,069 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:06,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:06,270 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:06,270 INFO L82 PathProgramCache]: Analyzing trace with hash 522919866, now seen corresponding path program 60 times [2021-07-09 18:46:06,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:06,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295606720] [2021-07-09 18:46:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:06,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:06,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295606720] [2021-07-09 18:46:06,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295606720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:06,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323538423] [2021-07-09 18:46:06,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:06,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:06,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:06,757 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 18:46:06,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:06,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:06,768 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 18:46:06,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:06,949 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 18:46:06,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:06,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:06,960 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 18:46:06,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:07,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323538423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:07,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:07,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:07,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571028430] [2021-07-09 18:46:07,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:07,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:07,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:07,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:07,372 INFO L87 Difference]: Start difference. First operand 7103 states and 21563 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:09,437 INFO L93 Difference]: Finished difference Result 8014 states and 24285 transitions. [2021-07-09 18:46:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:46:09,438 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:09,452 INFO L225 Difference]: With dead ends: 8014 [2021-07-09 18:46:09,452 INFO L226 Difference]: Without dead ends: 7975 [2021-07-09 18:46:09,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1959.8ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7975 states. [2021-07-09 18:46:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7975 to 7099. [2021-07-09 18:46:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 3.036770921386306) internal successors, (21555), 7098 states have internal predecessors, (21555), 0 states have call successors, (0), 0 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 18:46:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 21555 transitions. [2021-07-09 18:46:09,560 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 21555 transitions. Word has length 48 [2021-07-09 18:46:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:09,560 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 21555 transitions. [2021-07-09 18:46:09,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 21555 transitions. [2021-07-09 18:46:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:09,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:09,570 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:09,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-09 18:46:09,786 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:09,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1766967226, now seen corresponding path program 61 times [2021-07-09 18:46:09,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:09,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62348653] [2021-07-09 18:46:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:10,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:10,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62348653] [2021-07-09 18:46:10,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62348653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760880416] [2021-07-09 18:46:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:10,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:10,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:10,351 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 18:46:10,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:10,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:10,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:10,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:10,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:10,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760880416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:10,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:10,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:10,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322326095] [2021-07-09 18:46:10,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:10,953 INFO L87 Difference]: Start difference. First operand 7099 states and 21555 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:13,066 INFO L93 Difference]: Finished difference Result 8054 states and 24366 transitions. [2021-07-09 18:46:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:13,080 INFO L225 Difference]: With dead ends: 8054 [2021-07-09 18:46:13,080 INFO L226 Difference]: Without dead ends: 8014 [2021-07-09 18:46:13,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 2116.2ms TimeCoverageRelationStatistics Valid=283, Invalid=3257, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:46:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-07-09 18:46:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7105. [2021-07-09 18:46:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.036036036036036) internal successors, (21568), 7104 states have internal predecessors, (21568), 0 states have call successors, (0), 0 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 18:46:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21568 transitions. [2021-07-09 18:46:13,183 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21568 transitions. Word has length 48 [2021-07-09 18:46:13,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:13,183 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21568 transitions. [2021-07-09 18:46:13,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21568 transitions. [2021-07-09 18:46:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:13,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:13,192 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:13,392 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash -764330140, now seen corresponding path program 62 times [2021-07-09 18:46:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471579861] [2021-07-09 18:46:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:13,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:13,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471579861] [2021-07-09 18:46:13,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471579861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:13,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800304926] [2021-07-09 18:46:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:13,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:13,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:13,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:13,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:13,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:13,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:13,908 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 18:46:13,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:14,119 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 15 treesize of output 7 [2021-07-09 18:46:14,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:14,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:14,131 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 18:46:14,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800304926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:14,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:14,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178533193] [2021-07-09 18:46:14,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:14,536 INFO L87 Difference]: Start difference. First operand 7105 states and 21568 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:16,522 INFO L93 Difference]: Finished difference Result 8024 states and 24306 transitions. [2021-07-09 18:46:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:46:16,522 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:16,535 INFO L225 Difference]: With dead ends: 8024 [2021-07-09 18:46:16,535 INFO L226 Difference]: Without dead ends: 7979 [2021-07-09 18:46:16,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1963.9ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-07-09 18:46:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 7099. [2021-07-09 18:46:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 3.0364891518737673) internal successors, (21553), 7098 states have internal predecessors, (21553), 0 states have call successors, (0), 0 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 18:46:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 21553 transitions. [2021-07-09 18:46:16,636 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 21553 transitions. Word has length 48 [2021-07-09 18:46:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:16,636 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 21553 transitions. [2021-07-09 18:46:16,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 21553 transitions. [2021-07-09 18:46:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:16,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:16,645 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:16,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:16,853 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash -704033798, now seen corresponding path program 63 times [2021-07-09 18:46:16,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:16,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727029239] [2021-07-09 18:46:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:17,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:17,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727029239] [2021-07-09 18:46:17,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727029239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:17,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704341352] [2021-07-09 18:46:17,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:17,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:17,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:17,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:17,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:17,354 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 18:46:17,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:17,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:17,366 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 18:46:17,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:17,548 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 18:46:17,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:17,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:17,560 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 18:46:17,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:17,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704341352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:17,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:17,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:17,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875994496] [2021-07-09 18:46:17,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:17,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:17,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:17,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:17,962 INFO L87 Difference]: Start difference. First operand 7099 states and 21553 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:19,712 INFO L93 Difference]: Finished difference Result 9206 states and 27700 transitions. [2021-07-09 18:46:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:46:19,713 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:19,727 INFO L225 Difference]: With dead ends: 9206 [2021-07-09 18:46:19,727 INFO L226 Difference]: Without dead ends: 9171 [2021-07-09 18:46:19,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1742.2ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:46:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9171 states. [2021-07-09 18:46:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9171 to 7103. [2021-07-09 18:46:19,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 3.0359053787665444) internal successors, (21561), 7102 states have internal predecessors, (21561), 0 states have call successors, (0), 0 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 18:46:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 21561 transitions. [2021-07-09 18:46:19,844 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 21561 transitions. Word has length 48 [2021-07-09 18:46:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:19,844 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 21561 transitions. [2021-07-09 18:46:19,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 21561 transitions. [2021-07-09 18:46:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:19,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:19,853 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:20,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:20,054 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1311471558, now seen corresponding path program 64 times [2021-07-09 18:46:20,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:20,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447212252] [2021-07-09 18:46:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:20,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447212252] [2021-07-09 18:46:20,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447212252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:20,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562291545] [2021-07-09 18:46:20,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:20,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:20,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:20,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:20,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:20,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:20,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:20,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:20,593 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 18:46:20,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:20,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:20,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:20,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:20,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:20,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:21,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562291545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:21,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:21,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:21,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720807480] [2021-07-09 18:46:21,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:21,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:21,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:21,187 INFO L87 Difference]: Start difference. First operand 7103 states and 21561 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:22,995 INFO L93 Difference]: Finished difference Result 9210 states and 27706 transitions. [2021-07-09 18:46:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:46:22,995 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:22,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:23,010 INFO L225 Difference]: With dead ends: 9210 [2021-07-09 18:46:23,010 INFO L226 Difference]: Without dead ends: 9165 [2021-07-09 18:46:23,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1780.6ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:46:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2021-07-09 18:46:23,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 7097. [2021-07-09 18:46:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 3.0366403607666292) internal successors, (21548), 7096 states have internal predecessors, (21548), 0 states have call successors, (0), 0 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 18:46:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 21548 transitions. [2021-07-09 18:46:23,126 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 21548 transitions. Word has length 48 [2021-07-09 18:46:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:23,126 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 21548 transitions. [2021-07-09 18:46:23,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 21548 transitions. [2021-07-09 18:46:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:23,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:23,135 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:23,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:23,336 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:23,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash -774308786, now seen corresponding path program 65 times [2021-07-09 18:46:23,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:23,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249948812] [2021-07-09 18:46:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:23,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249948812] [2021-07-09 18:46:23,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249948812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:23,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346172808] [2021-07-09 18:46:23,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:23,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:23,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:46:23,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:23,861 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 18:46:23,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:23,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:23,872 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 18:46:23,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:24,054 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 18:46:24,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:24,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:24,065 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 18:46:24,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:24,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346172808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:24,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:24,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:24,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016737325] [2021-07-09 18:46:24,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:24,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:24,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:24,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:24,505 INFO L87 Difference]: Start difference. First operand 7097 states and 21548 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:26,644 INFO L93 Difference]: Finished difference Result 8059 states and 24378 transitions. [2021-07-09 18:46:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:26,657 INFO L225 Difference]: With dead ends: 8059 [2021-07-09 18:46:26,657 INFO L226 Difference]: Without dead ends: 8006 [2021-07-09 18:46:26,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1998.6ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:46:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-07-09 18:46:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 7105. [2021-07-09 18:46:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.0351914414414414) internal successors, (21562), 7104 states have internal predecessors, (21562), 0 states have call successors, (0), 0 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 18:46:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21562 transitions. [2021-07-09 18:46:26,757 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21562 transitions. Word has length 48 [2021-07-09 18:46:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:26,757 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21562 transitions. [2021-07-09 18:46:26,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21562 transitions. [2021-07-09 18:46:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:26,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:26,766 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:26,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:26,967 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1650491250, now seen corresponding path program 66 times [2021-07-09 18:46:26,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:26,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765391827] [2021-07-09 18:46:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:27,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:27,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765391827] [2021-07-09 18:46:27,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765391827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:27,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034180783] [2021-07-09 18:46:27,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:27,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:27,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:27,466 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 18:46:27,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:27,478 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 18:46:27,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:27,660 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 18:46:27,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:27,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:27,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:28,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034180783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:28,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:28,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:28,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852659058] [2021-07-09 18:46:28,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:28,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:28,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:28,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:28,073 INFO L87 Difference]: Start difference. First operand 7105 states and 21562 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:29,720 INFO L93 Difference]: Finished difference Result 9208 states and 27699 transitions. [2021-07-09 18:46:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:46:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:29,736 INFO L225 Difference]: With dead ends: 9208 [2021-07-09 18:46:29,736 INFO L226 Difference]: Without dead ends: 9165 [2021-07-09 18:46:29,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1764.5ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9165 states. [2021-07-09 18:46:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9165 to 7097. [2021-07-09 18:46:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 3.036499436302142) internal successors, (21547), 7096 states have internal predecessors, (21547), 0 states have call successors, (0), 0 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 18:46:29,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 21547 transitions. [2021-07-09 18:46:29,856 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 21547 transitions. Word has length 48 [2021-07-09 18:46:29,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:29,856 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 21547 transitions. [2021-07-09 18:46:29,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:29,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 21547 transitions. [2021-07-09 18:46:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:29,866 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:29,866 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:30,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-09 18:46:30,066 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:30,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1364562110, now seen corresponding path program 67 times [2021-07-09 18:46:30,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:30,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102770644] [2021-07-09 18:46:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:30,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102770644] [2021-07-09 18:46:30,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102770644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:30,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669391405] [2021-07-09 18:46:30,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:30,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:30,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:30,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:30,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:30,613 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 18:46:30,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:30,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:30,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:30,805 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 18:46:30,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:31,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669391405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:31,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:31,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:31,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741948935] [2021-07-09 18:46:31,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:31,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:31,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:31,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:31,214 INFO L87 Difference]: Start difference. First operand 7097 states and 21547 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:33,295 INFO L93 Difference]: Finished difference Result 8067 states and 24395 transitions. [2021-07-09 18:46:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:33,309 INFO L225 Difference]: With dead ends: 8067 [2021-07-09 18:46:33,309 INFO L226 Difference]: Without dead ends: 8014 [2021-07-09 18:46:33,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2084.6ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:46:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-07-09 18:46:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7109. [2021-07-09 18:46:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.0350309510410804) internal successors, (21573), 7108 states have internal predecessors, (21573), 0 states have call successors, (0), 0 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 18:46:33,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21573 transitions. [2021-07-09 18:46:33,421 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21573 transitions. Word has length 48 [2021-07-09 18:46:33,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:33,421 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21573 transitions. [2021-07-09 18:46:33,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:33,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21573 transitions. [2021-07-09 18:46:33,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:33,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:33,431 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:33,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:33,645 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1166735256, now seen corresponding path program 68 times [2021-07-09 18:46:33,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:33,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067353855] [2021-07-09 18:46:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:34,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:34,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067353855] [2021-07-09 18:46:34,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067353855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954658633] [2021-07-09 18:46:34,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:34,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:34,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:34,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:34,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:34,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:34,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:34,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:34,178 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 18:46:34,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:34,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:34,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:34,368 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 18:46:34,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954658633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:34,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:34,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:34,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398515090] [2021-07-09 18:46:34,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:34,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:34,797 INFO L87 Difference]: Start difference. First operand 7109 states and 21573 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:36,635 INFO L93 Difference]: Finished difference Result 9216 states and 27718 transitions. [2021-07-09 18:46:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:46:36,635 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:36,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:36,652 INFO L225 Difference]: With dead ends: 9216 [2021-07-09 18:46:36,652 INFO L226 Difference]: Without dead ends: 9163 [2021-07-09 18:46:36,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1783.5ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9163 states. [2021-07-09 18:46:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9163 to 7095. [2021-07-09 18:46:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7095 states, 7094 states have (on average 3.036650690724556) internal successors, (21542), 7094 states have internal predecessors, (21542), 0 states have call successors, (0), 0 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 18:46:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 21542 transitions. [2021-07-09 18:46:36,782 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 21542 transitions. Word has length 48 [2021-07-09 18:46:36,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:36,782 INFO L482 AbstractCegarLoop]: Abstraction has 7095 states and 21542 transitions. [2021-07-09 18:46:36,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 21542 transitions. [2021-07-09 18:46:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:36,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:36,791 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:36,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:46:36,991 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1712433508, now seen corresponding path program 69 times [2021-07-09 18:46:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:36,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009889910] [2021-07-09 18:46:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:37,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:37,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009889910] [2021-07-09 18:46:37,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009889910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:37,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380720083] [2021-07-09 18:46:37,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:37,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:37,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:37,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:37,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:37,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:37,516 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 18:46:37,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:37,717 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 18:46:37,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:37,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:37,729 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 18:46:37,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:38,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380720083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:38,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:38,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:38,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425852621] [2021-07-09 18:46:38,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:38,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:38,141 INFO L87 Difference]: Start difference. First operand 7095 states and 21542 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:40,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:40,223 INFO L93 Difference]: Finished difference Result 8040 states and 24330 transitions. [2021-07-09 18:46:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:40,223 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:40,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:40,237 INFO L225 Difference]: With dead ends: 8040 [2021-07-09 18:46:40,237 INFO L226 Difference]: Without dead ends: 8000 [2021-07-09 18:46:40,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2018.1ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:46:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2021-07-09 18:46:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 7099. [2021-07-09 18:46:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 3.03592561284869) internal successors, (21549), 7098 states have internal predecessors, (21549), 0 states have call successors, (0), 0 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 18:46:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 21549 transitions. [2021-07-09 18:46:40,340 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 21549 transitions. Word has length 48 [2021-07-09 18:46:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:40,340 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 21549 transitions. [2021-07-09 18:46:40,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:40,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 21549 transitions. [2021-07-09 18:46:40,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:40,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:40,349 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:40,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-09 18:46:40,549 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:40,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1706351324, now seen corresponding path program 70 times [2021-07-09 18:46:40,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:40,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511358837] [2021-07-09 18:46:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:40,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511358837] [2021-07-09 18:46:40,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511358837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209804028] [2021-07-09 18:46:40,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:40,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:46:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:40,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:41,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:41,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:41,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:41,103 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 18:46:41,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:46:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:41,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:41,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:41,297 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 18:46:41,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:41,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209804028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:41,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:41,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:41,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329195462] [2021-07-09 18:46:41,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:41,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:41,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:41,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:41,696 INFO L87 Difference]: Start difference. First operand 7099 states and 21549 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:43,375 INFO L93 Difference]: Finished difference Result 9202 states and 27686 transitions. [2021-07-09 18:46:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:46:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:43,391 INFO L225 Difference]: With dead ends: 9202 [2021-07-09 18:46:43,391 INFO L226 Difference]: Without dead ends: 9155 [2021-07-09 18:46:43,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1781.2ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2021-07-09 18:46:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 7087. [2021-07-09 18:46:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7087 states, 7086 states have (on average 3.0379621789443974) internal successors, (21527), 7086 states have internal predecessors, (21527), 0 states have call successors, (0), 0 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 18:46:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7087 states to 7087 states and 21527 transitions. [2021-07-09 18:46:43,510 INFO L78 Accepts]: Start accepts. Automaton has 7087 states and 21527 transitions. Word has length 48 [2021-07-09 18:46:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:43,510 INFO L482 AbstractCegarLoop]: Abstraction has 7087 states and 21527 transitions. [2021-07-09 18:46:43,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7087 states and 21527 transitions. [2021-07-09 18:46:43,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:43,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:43,520 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:43,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-09 18:46:43,720 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash -719107078, now seen corresponding path program 71 times [2021-07-09 18:46:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:43,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607488562] [2021-07-09 18:46:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:44,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607488562] [2021-07-09 18:46:44,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607488562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995927366] [2021-07-09 18:46:44,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:44,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:46:44,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:44,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:46:44,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:44,223 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 18:46:44,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:44,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:44,234 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 18:46:44,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:44,415 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 18:46:44,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:44,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:44,426 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 18:46:44,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:44,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995927366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:44,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:44,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:44,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319608609] [2021-07-09 18:46:44,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:44,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:44,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:44,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:44,839 INFO L87 Difference]: Start difference. First operand 7087 states and 21527 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:46,709 INFO L93 Difference]: Finished difference Result 8038 states and 24328 transitions. [2021-07-09 18:46:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:46,709 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:46,722 INFO L225 Difference]: With dead ends: 8038 [2021-07-09 18:46:46,723 INFO L226 Difference]: Without dead ends: 7998 [2021-07-09 18:46:46,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 2021.4ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:46:46,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-07-09 18:46:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 7093. [2021-07-09 18:46:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 7092 states have (on average 3.0372250423011846) internal successors, (21540), 7092 states have internal predecessors, (21540), 0 states have call successors, (0), 0 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 18:46:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 21540 transitions. [2021-07-09 18:46:46,825 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 21540 transitions. Word has length 48 [2021-07-09 18:46:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:46,825 INFO L482 AbstractCegarLoop]: Abstraction has 7093 states and 21540 transitions. [2021-07-09 18:46:46,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 21540 transitions. [2021-07-09 18:46:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:46,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:46,863 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:47,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:47,064 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1044562852, now seen corresponding path program 72 times [2021-07-09 18:46:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:47,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689322823] [2021-07-09 18:46:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:47,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689322823] [2021-07-09 18:46:47,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689322823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852900603] [2021-07-09 18:46:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:47,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:46:47,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:47,567 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 18:46:47,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:47,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:47,578 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 18:46:47,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:47,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:47,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:47,772 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 18:46:47,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852900603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:48,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:48,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:48,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988261168] [2021-07-09 18:46:48,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:48,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:48,175 INFO L87 Difference]: Start difference. First operand 7093 states and 21540 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:49,929 INFO L93 Difference]: Finished difference Result 9200 states and 27685 transitions. [2021-07-09 18:46:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:46:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:49,946 INFO L225 Difference]: With dead ends: 9200 [2021-07-09 18:46:49,946 INFO L226 Difference]: Without dead ends: 9112 [2021-07-09 18:46:49,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1769.5ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:46:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2021-07-09 18:46:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 7044. [2021-07-09 18:46:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7044 states, 7043 states have (on average 3.0435893795257702) internal successors, (21436), 7043 states have internal predecessors, (21436), 0 states have call successors, (0), 0 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 18:46:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7044 states to 7044 states and 21436 transitions. [2021-07-09 18:46:50,070 INFO L78 Accepts]: Start accepts. Automaton has 7044 states and 21436 transitions. Word has length 48 [2021-07-09 18:46:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:50,070 INFO L482 AbstractCegarLoop]: Abstraction has 7044 states and 21436 transitions. [2021-07-09 18:46:50,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7044 states and 21436 transitions. [2021-07-09 18:46:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:50,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:50,079 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:50,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-09 18:46:50,280 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:50,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:50,280 INFO L82 PathProgramCache]: Analyzing trace with hash -956697154, now seen corresponding path program 73 times [2021-07-09 18:46:50,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:50,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938847714] [2021-07-09 18:46:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:50,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938847714] [2021-07-09 18:46:50,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938847714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:50,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713151632] [2021-07-09 18:46:50,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:50,779 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 18:46:50,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:50,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:50,790 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 18:46:50,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:50,996 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 18:46:50,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:51,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:51,009 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 18:46:51,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:51,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713151632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:51,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:51,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:46:51,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764497729] [2021-07-09 18:46:51,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:46:51,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:46:51,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:46:51,444 INFO L87 Difference]: Start difference. First operand 7044 states and 21436 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:53,121 INFO L93 Difference]: Finished difference Result 9333 states and 28059 transitions. [2021-07-09 18:46:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:46:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:53,137 INFO L225 Difference]: With dead ends: 9333 [2021-07-09 18:46:53,137 INFO L226 Difference]: Without dead ends: 9215 [2021-07-09 18:46:53,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1838.5ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:46:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2021-07-09 18:46:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 7064. [2021-07-09 18:46:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7064 states, 7063 states have (on average 3.0404927084808153) internal successors, (21475), 7063 states have internal predecessors, (21475), 0 states have call successors, (0), 0 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 18:46:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7064 states to 7064 states and 21475 transitions. [2021-07-09 18:46:53,269 INFO L78 Accepts]: Start accepts. Automaton has 7064 states and 21475 transitions. Word has length 48 [2021-07-09 18:46:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 7064 states and 21475 transitions. [2021-07-09 18:46:53,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:46:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7064 states and 21475 transitions. [2021-07-09 18:46:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:53,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:53,279 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:53,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:53,479 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:53,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash -849246786, now seen corresponding path program 74 times [2021-07-09 18:46:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:53,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946744460] [2021-07-09 18:46:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:53,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:53,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946744460] [2021-07-09 18:46:53,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946744460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:53,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767230508] [2021-07-09 18:46:53,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:53,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:46:53,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:53,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:53,999 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 18:46:54,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:54,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:54,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:54,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:54,196 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 18:46:54,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:54,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:54,207 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 18:46:54,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:46:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:54,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767230508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:54,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:54,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:46:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63788627] [2021-07-09 18:46:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:46:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:46:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:46:54,674 INFO L87 Difference]: Start difference. First operand 7064 states and 21475 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:46:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:46:56,703 INFO L93 Difference]: Finished difference Result 8013 states and 24273 transitions. [2021-07-09 18:46:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:46:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:46:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:46:56,717 INFO L225 Difference]: With dead ends: 8013 [2021-07-09 18:46:56,717 INFO L226 Difference]: Without dead ends: 7973 [2021-07-09 18:46:56,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2108.8ms TimeCoverageRelationStatistics Valid=278, Invalid=3628, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:46:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2021-07-09 18:46:56,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7076. [2021-07-09 18:46:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.039434628975265) internal successors, (21504), 7075 states have internal predecessors, (21504), 0 states have call successors, (0), 0 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 18:46:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 21504 transitions. [2021-07-09 18:46:56,823 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 21504 transitions. Word has length 48 [2021-07-09 18:46:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:46:56,823 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 21504 transitions. [2021-07-09 18:46:56,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:46:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 21504 transitions. [2021-07-09 18:46:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:46:56,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:46:56,833 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:46:57,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:57,033 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:46:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:46:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1725429250, now seen corresponding path program 75 times [2021-07-09 18:46:57,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:46:57,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69161684] [2021-07-09 18:46:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:46:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:46:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:57,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:46:57,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69161684] [2021-07-09 18:46:57,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69161684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:57,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962251259] [2021-07-09 18:46:57,458 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:46:57,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:46:57,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:46:57,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:46:57,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:46:57,593 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 18:46:57,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:57,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:57,605 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 18:46:57,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:46:57,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:46:57,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:46:57,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:46:57,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:46:57,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:46:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:46:58,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962251259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:46:58,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:46:58,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:46:58,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745211746] [2021-07-09 18:46:58,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:46:58,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:46:58,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:46:58,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:46:58,257 INFO L87 Difference]: Start difference. First operand 7076 states and 21504 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:00,031 INFO L93 Difference]: Finished difference Result 9173 states and 27615 transitions. [2021-07-09 18:47:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:47:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:47:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:00,046 INFO L225 Difference]: With dead ends: 9173 [2021-07-09 18:47:00,047 INFO L226 Difference]: Without dead ends: 9134 [2021-07-09 18:47:00,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1915.5ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:47:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9134 states. [2021-07-09 18:47:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9134 to 7072. [2021-07-09 18:47:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 7071 states have (on average 3.039598359496535) internal successors, (21493), 7071 states have internal predecessors, (21493), 0 states have call successors, (0), 0 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 18:47:00,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 21493 transitions. [2021-07-09 18:47:00,165 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 21493 transitions. Word has length 48 [2021-07-09 18:47:00,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:00,165 INFO L482 AbstractCegarLoop]: Abstraction has 7072 states and 21493 transitions. [2021-07-09 18:47:00,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:00,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 21493 transitions. [2021-07-09 18:47:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:00,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:00,174 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:00,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:00,380 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:00,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1583714110, now seen corresponding path program 76 times [2021-07-09 18:47:00,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:00,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217788695] [2021-07-09 18:47:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:00,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:00,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217788695] [2021-07-09 18:47:00,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217788695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:00,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469140560] [2021-07-09 18:47:00,774 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:00,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:00,900 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 18:47:00,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:00,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:00,912 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 18:47:00,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:01,098 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 18:47:01,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:01,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:01,109 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 18:47:01,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:01,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469140560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:01,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:01,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:47:01,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669933941] [2021-07-09 18:47:01,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:47:01,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:01,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:47:01,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:47:01,584 INFO L87 Difference]: Start difference. First operand 7072 states and 21493 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:03,181 INFO L93 Difference]: Finished difference Result 9276 states and 27906 transitions. [2021-07-09 18:47:03,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:47:03,181 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:47:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:03,197 INFO L225 Difference]: With dead ends: 9276 [2021-07-09 18:47:03,197 INFO L226 Difference]: Without dead ends: 9219 [2021-07-09 18:47:03,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1840.6ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:47:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-07-09 18:47:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7068. [2021-07-09 18:47:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.0397622753643696) internal successors, (21482), 7067 states have internal predecessors, (21482), 0 states have call successors, (0), 0 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 18:47:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 21482 transitions. [2021-07-09 18:47:03,329 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 21482 transitions. Word has length 48 [2021-07-09 18:47:03,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:03,329 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 21482 transitions. [2021-07-09 18:47:03,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 21482 transitions. [2021-07-09 18:47:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:03,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:03,339 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:03,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,552 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1428105726, now seen corresponding path program 77 times [2021-07-09 18:47:03,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:03,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690413369] [2021-07-09 18:47:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:03,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690413369] [2021-07-09 18:47:03,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690413369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007809898] [2021-07-09 18:47:03,949 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:03,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:47:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:04,066 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 18:47:04,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:04,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:04,078 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 18:47:04,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:04,260 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 18:47:04,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:04,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:04,272 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 18:47:04,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007809898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:04,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:47:04,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002049750] [2021-07-09 18:47:04,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:47:04,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:47:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:47:04,728 INFO L87 Difference]: Start difference. First operand 7068 states and 21482 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:06,376 INFO L93 Difference]: Finished difference Result 9285 states and 27926 transitions. [2021-07-09 18:47:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:47:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:47:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:06,393 INFO L225 Difference]: With dead ends: 9285 [2021-07-09 18:47:06,393 INFO L226 Difference]: Without dead ends: 9199 [2021-07-09 18:47:06,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1815.0ms TimeCoverageRelationStatistics Valid=246, Invalid=3414, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:47:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-07-09 18:47:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 7048. [2021-07-09 18:47:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7048 states, 7047 states have (on average 3.0428551156520505) internal successors, (21443), 7047 states have internal predecessors, (21443), 0 states have call successors, (0), 0 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 18:47:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7048 states to 7048 states and 21443 transitions. [2021-07-09 18:47:06,517 INFO L78 Accepts]: Start accepts. Automaton has 7048 states and 21443 transitions. Word has length 48 [2021-07-09 18:47:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:06,518 INFO L482 AbstractCegarLoop]: Abstraction has 7048 states and 21443 transitions. [2021-07-09 18:47:06,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7048 states and 21443 transitions. [2021-07-09 18:47:06,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:06,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:06,527 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:06,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-09 18:47:06,728 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:06,728 INFO L82 PathProgramCache]: Analyzing trace with hash 685983366, now seen corresponding path program 78 times [2021-07-09 18:47:06,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:06,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736792255] [2021-07-09 18:47:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:07,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736792255] [2021-07-09 18:47:07,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736792255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:07,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010609541] [2021-07-09 18:47:07,155 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:07,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:07,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:47:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:07,270 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 18:47:07,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:07,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:07,283 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 18:47:07,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:07,499 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 18:47:07,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:07,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:07,511 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 18:47:07,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:07,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010609541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:07,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:07,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:07,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129793485] [2021-07-09 18:47:07,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:07,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:07,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:07,922 INFO L87 Difference]: Start difference. First operand 7048 states and 21443 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:09,545 INFO L93 Difference]: Finished difference Result 9317 states and 28011 transitions. [2021-07-09 18:47:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:47:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:09,559 INFO L225 Difference]: With dead ends: 9317 [2021-07-09 18:47:09,560 INFO L226 Difference]: Without dead ends: 9182 [2021-07-09 18:47:09,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1858.8ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:47:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-07-09 18:47:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 7044. [2021-07-09 18:47:09,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7044 states, 7043 states have (on average 3.043447394576175) internal successors, (21435), 7043 states have internal predecessors, (21435), 0 states have call successors, (0), 0 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 18:47:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7044 states to 7044 states and 21435 transitions. [2021-07-09 18:47:09,672 INFO L78 Accepts]: Start accepts. Automaton has 7044 states and 21435 transitions. Word has length 48 [2021-07-09 18:47:09,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:09,672 INFO L482 AbstractCegarLoop]: Abstraction has 7044 states and 21435 transitions. [2021-07-09 18:47:09,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:09,672 INFO L276 IsEmpty]: Start isEmpty. Operand 7044 states and 21435 transitions. [2021-07-09 18:47:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:09,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:09,681 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:09,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 18:47:09,881 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1041222010, now seen corresponding path program 79 times [2021-07-09 18:47:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:09,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740359275] [2021-07-09 18:47:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:10,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740359275] [2021-07-09 18:47:10,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740359275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909776338] [2021-07-09 18:47:10,295 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:10,418 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 18:47:10,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:10,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:10,430 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 18:47:10,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:10,622 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 18:47:10,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:10,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:10,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:47:10,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:11,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909776338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:11,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:11,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:11,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304162831] [2021-07-09 18:47:11,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:11,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:11,041 INFO L87 Difference]: Start difference. First operand 7044 states and 21435 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:12,705 INFO L93 Difference]: Finished difference Result 9373 states and 28151 transitions. [2021-07-09 18:47:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:47:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:12,722 INFO L225 Difference]: With dead ends: 9373 [2021-07-09 18:47:12,722 INFO L226 Difference]: Without dead ends: 9255 [2021-07-09 18:47:12,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1807.7ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:47:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2021-07-09 18:47:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 7122. [2021-07-09 18:47:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 3.0359500070214858) internal successors, (21619), 7121 states have internal predecessors, (21619), 0 states have call successors, (0), 0 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 18:47:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 21619 transitions. [2021-07-09 18:47:12,839 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 21619 transitions. Word has length 48 [2021-07-09 18:47:12,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:12,839 INFO L482 AbstractCegarLoop]: Abstraction has 7122 states and 21619 transitions. [2021-07-09 18:47:12,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 21619 transitions. [2021-07-09 18:47:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:12,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:12,848 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:13,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:13,048 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:13,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1872308368, now seen corresponding path program 80 times [2021-07-09 18:47:13,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:13,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436599585] [2021-07-09 18:47:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:13,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436599585] [2021-07-09 18:47:13,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436599585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:13,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081791074] [2021-07-09 18:47:13,449 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:13,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:13,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:13,593 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 18:47:13,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:13,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:13,604 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 18:47:13,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:13,790 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 18:47:13,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:13,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:13,802 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 18:47:13,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:14,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081791074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:14,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:14,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:47:14,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167397545] [2021-07-09 18:47:14,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:47:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:47:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:47:14,255 INFO L87 Difference]: Start difference. First operand 7122 states and 21619 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:16,498 INFO L93 Difference]: Finished difference Result 8045 states and 24344 transitions. [2021-07-09 18:47:16,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:47:16,498 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:47:16,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:16,512 INFO L225 Difference]: With dead ends: 8045 [2021-07-09 18:47:16,512 INFO L226 Difference]: Without dead ends: 8005 [2021-07-09 18:47:16,512 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 2104.1ms TimeCoverageRelationStatistics Valid=278, Invalid=3628, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:47:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8005 states. [2021-07-09 18:47:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8005 to 7140. [2021-07-09 18:47:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.034598683288976) internal successors, (21664), 7139 states have internal predecessors, (21664), 0 states have call successors, (0), 0 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 18:47:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21664 transitions. [2021-07-09 18:47:16,624 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21664 transitions. Word has length 48 [2021-07-09 18:47:16,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:16,624 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21664 transitions. [2021-07-09 18:47:16,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21664 transitions. [2021-07-09 18:47:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:16,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:16,635 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:16,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-09 18:47:16,838 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:16,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1643549524, now seen corresponding path program 81 times [2021-07-09 18:47:16,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:16,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146257289] [2021-07-09 18:47:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:17,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:17,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146257289] [2021-07-09 18:47:17,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146257289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:17,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89995551] [2021-07-09 18:47:17,256 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:17,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:47:17,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:17,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:47:17,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:17,372 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 18:47:17,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:17,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:17,384 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 18:47:17,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:17,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:17,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:17,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:47:17,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:18,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89995551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:18,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:18,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-07-09 18:47:18,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310692128] [2021-07-09 18:47:18,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:47:18,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:47:18,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:47:18,150 INFO L87 Difference]: Start difference. First operand 7140 states and 21664 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:47:20,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:20,133 INFO L93 Difference]: Finished difference Result 9223 states and 27735 transitions. [2021-07-09 18:47:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:47:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:47:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:20,147 INFO L225 Difference]: With dead ends: 9223 [2021-07-09 18:47:20,148 INFO L226 Difference]: Without dead ends: 9178 [2021-07-09 18:47:20,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2158.1ms TimeCoverageRelationStatistics Valid=287, Invalid=3873, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:47:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9178 states. [2021-07-09 18:47:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9178 to 7134. [2021-07-09 18:47:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.034487592878172) internal successors, (21645), 7133 states have internal predecessors, (21645), 0 states have call successors, (0), 0 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 18:47:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21645 transitions. [2021-07-09 18:47:20,254 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21645 transitions. Word has length 48 [2021-07-09 18:47:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:20,255 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21645 transitions. [2021-07-09 18:47:20,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:47:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21645 transitions. [2021-07-09 18:47:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:20,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:20,263 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:20,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:20,463 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:20,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 696817724, now seen corresponding path program 82 times [2021-07-09 18:47:20,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:20,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188875069] [2021-07-09 18:47:20,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:20,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:20,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188875069] [2021-07-09 18:47:20,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188875069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:20,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790435330] [2021-07-09 18:47:20,873 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:20,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:20,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:20,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:20,994 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 18:47:20,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:21,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:21,006 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 18:47:21,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:21,194 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 18:47:21,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:21,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:21,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:47:21,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:21,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790435330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:21,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:21,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:47:21,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113135375] [2021-07-09 18:47:21,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:47:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:47:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:47:21,649 INFO L87 Difference]: Start difference. First operand 7134 states and 21645 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:23,421 INFO L93 Difference]: Finished difference Result 9320 states and 28010 transitions. [2021-07-09 18:47:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:47:23,421 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:47:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:23,436 INFO L225 Difference]: With dead ends: 9320 [2021-07-09 18:47:23,436 INFO L226 Difference]: Without dead ends: 9261 [2021-07-09 18:47:23,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1824.4ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:47:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9261 states. [2021-07-09 18:47:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9261 to 7128. [2021-07-09 18:47:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0347972498947664) internal successors, (21629), 7127 states have internal predecessors, (21629), 0 states have call successors, (0), 0 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 18:47:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21629 transitions. [2021-07-09 18:47:23,543 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21629 transitions. Word has length 48 [2021-07-09 18:47:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:23,543 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21629 transitions. [2021-07-09 18:47:23,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21629 transitions. [2021-07-09 18:47:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:23,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:23,580 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:23,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 18:47:23,780 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 542380206, now seen corresponding path program 83 times [2021-07-09 18:47:23,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:23,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711190400] [2021-07-09 18:47:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:24,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:24,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711190400] [2021-07-09 18:47:24,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711190400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:24,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913840762] [2021-07-09 18:47:24,196 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:24,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:24,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:47:24,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:24,312 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 18:47:24,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:24,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,323 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 18:47:24,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:24,504 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 18:47:24,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:24,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,515 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 18:47:24,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:25,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913840762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:25,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:25,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-07-09 18:47:25,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79410626] [2021-07-09 18:47:25,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:47:25,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:47:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:47:25,035 INFO L87 Difference]: Start difference. First operand 7128 states and 21629 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:47:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:26,923 INFO L93 Difference]: Finished difference Result 9327 states and 28025 transitions. [2021-07-09 18:47:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:47:26,924 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:47:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:26,938 INFO L225 Difference]: With dead ends: 9327 [2021-07-09 18:47:26,938 INFO L226 Difference]: Without dead ends: 9195 [2021-07-09 18:47:26,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2097.8ms TimeCoverageRelationStatistics Valid=284, Invalid=4138, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:47:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9195 states. [2021-07-09 18:47:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9195 to 7062. [2021-07-09 18:47:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7062 states, 7061 states have (on average 3.039937685880187) internal successors, (21465), 7061 states have internal predecessors, (21465), 0 states have call successors, (0), 0 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 18:47:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7062 states to 7062 states and 21465 transitions. [2021-07-09 18:47:27,043 INFO L78 Accepts]: Start accepts. Automaton has 7062 states and 21465 transitions. Word has length 48 [2021-07-09 18:47:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:27,043 INFO L482 AbstractCegarLoop]: Abstraction has 7062 states and 21465 transitions. [2021-07-09 18:47:27,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:47:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 7062 states and 21465 transitions. [2021-07-09 18:47:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:27,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:27,052 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:27,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:27,252 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1473777700, now seen corresponding path program 84 times [2021-07-09 18:47:27,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:27,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022085666] [2021-07-09 18:47:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:27,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:27,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022085666] [2021-07-09 18:47:27,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022085666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:27,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026246796] [2021-07-09 18:47:27,633 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:27,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:27,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:27,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:47:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:27,776 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 18:47:27,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:27,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:27,788 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 18:47:27,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:27,970 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 18:47:27,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:27,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:27,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:47:27,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:28,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026246796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:28,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:28,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:47:28,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333675629] [2021-07-09 18:47:28,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:47:28,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:47:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:47:28,457 INFO L87 Difference]: Start difference. First operand 7062 states and 21465 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:30,154 INFO L93 Difference]: Finished difference Result 9313 states and 27985 transitions. [2021-07-09 18:47:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:47:30,154 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:47:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:30,168 INFO L225 Difference]: With dead ends: 9313 [2021-07-09 18:47:30,168 INFO L226 Difference]: Without dead ends: 9155 [2021-07-09 18:47:30,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2018.9ms TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:47:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2021-07-09 18:47:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 7035. [2021-07-09 18:47:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7035 states, 7034 states have (on average 3.044640318453227) internal successors, (21416), 7034 states have internal predecessors, (21416), 0 states have call successors, (0), 0 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 18:47:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7035 states to 7035 states and 21416 transitions. [2021-07-09 18:47:30,271 INFO L78 Accepts]: Start accepts. Automaton has 7035 states and 21416 transitions. Word has length 48 [2021-07-09 18:47:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:30,271 INFO L482 AbstractCegarLoop]: Abstraction has 7035 states and 21416 transitions. [2021-07-09 18:47:30,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:47:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7035 states and 21416 transitions. [2021-07-09 18:47:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:30,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:30,279 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:30,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:30,481 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:30,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:30,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1173348314, now seen corresponding path program 85 times [2021-07-09 18:47:30,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:30,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077245565] [2021-07-09 18:47:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:30,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077245565] [2021-07-09 18:47:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077245565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694626637] [2021-07-09 18:47:30,852 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:30,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:30,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:30,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:30,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:30,975 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 18:47:30,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:47:31,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:31,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:31,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:31,161 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 18:47:31,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:31,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694626637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:31,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:31,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848646996] [2021-07-09 18:47:31,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:31,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:31,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:31,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:31,540 INFO L87 Difference]: Start difference. First operand 7035 states and 21416 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:34,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:34,049 INFO L93 Difference]: Finished difference Result 9541 states and 28637 transitions. [2021-07-09 18:47:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:34,049 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:34,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:34,063 INFO L225 Difference]: With dead ends: 9541 [2021-07-09 18:47:34,063 INFO L226 Difference]: Without dead ends: 9397 [2021-07-09 18:47:34,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2129.9ms TimeCoverageRelationStatistics Valid=324, Invalid=4506, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:47:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2021-07-09 18:47:34,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 7104. [2021-07-09 18:47:34,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7104 states, 7103 states have (on average 3.0408278192313105) internal successors, (21599), 7103 states have internal predecessors, (21599), 0 states have call successors, (0), 0 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 18:47:34,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7104 states to 7104 states and 21599 transitions. [2021-07-09 18:47:34,167 INFO L78 Accepts]: Start accepts. Automaton has 7104 states and 21599 transitions. Word has length 48 [2021-07-09 18:47:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:34,168 INFO L482 AbstractCegarLoop]: Abstraction has 7104 states and 21599 transitions. [2021-07-09 18:47:34,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7104 states and 21599 transitions. [2021-07-09 18:47:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:34,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:34,176 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:34,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:34,376 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1280798682, now seen corresponding path program 86 times [2021-07-09 18:47:34,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:34,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444435986] [2021-07-09 18:47:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:34,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:34,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444435986] [2021-07-09 18:47:34,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444435986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:34,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105883700] [2021-07-09 18:47:34,753 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:34,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:34,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:34,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:34,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:34,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:34,876 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 18:47:34,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:47:35,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:35,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:35,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:35,064 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 18:47:35,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:35,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105883700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:35,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:35,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097538815] [2021-07-09 18:47:35,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:35,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:35,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:35,463 INFO L87 Difference]: Start difference. First operand 7104 states and 21599 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:38,203 INFO L93 Difference]: Finished difference Result 8231 states and 24865 transitions. [2021-07-09 18:47:38,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:38,203 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:38,215 INFO L225 Difference]: With dead ends: 8231 [2021-07-09 18:47:38,215 INFO L226 Difference]: Without dead ends: 8191 [2021-07-09 18:47:38,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2450.6ms TimeCoverageRelationStatistics Valid=361, Invalid=4609, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:47:38,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2021-07-09 18:47:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 7161. [2021-07-09 18:47:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.035335195530726) internal successors, (21733), 7160 states have internal predecessors, (21733), 0 states have call successors, (0), 0 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 18:47:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21733 transitions. [2021-07-09 18:47:38,307 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21733 transitions. Word has length 48 [2021-07-09 18:47:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:38,307 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21733 transitions. [2021-07-09 18:47:38,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21733 transitions. [2021-07-09 18:47:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:38,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:38,315 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:38,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:38,516 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash 404616218, now seen corresponding path program 87 times [2021-07-09 18:47:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:38,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195504120] [2021-07-09 18:47:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:38,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:38,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195504120] [2021-07-09 18:47:38,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195504120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:38,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580813114] [2021-07-09 18:47:38,888 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:38,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:47:38,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:38,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:38,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:39,007 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 18:47:39,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:39,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:39,018 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 18:47:39,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:39,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:39,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:39,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:39,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:47:39,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:39,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580813114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:39,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:39,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65581587] [2021-07-09 18:47:39,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:39,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:39,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:39,612 INFO L87 Difference]: Start difference. First operand 7161 states and 21733 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:42,053 INFO L93 Difference]: Finished difference Result 9459 states and 28413 transitions. [2021-07-09 18:47:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:47:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:42,068 INFO L225 Difference]: With dead ends: 9459 [2021-07-09 18:47:42,068 INFO L226 Difference]: Without dead ends: 9420 [2021-07-09 18:47:42,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2157.6ms TimeCoverageRelationStatistics Valid=305, Invalid=4251, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:47:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-07-09 18:47:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 7157. [2021-07-09 18:47:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7157 states, 7156 states have (on average 3.0354946897708217) internal successors, (21722), 7156 states have internal predecessors, (21722), 0 states have call successors, (0), 0 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 18:47:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7157 states to 7157 states and 21722 transitions. [2021-07-09 18:47:42,192 INFO L78 Accepts]: Start accepts. Automaton has 7157 states and 21722 transitions. Word has length 48 [2021-07-09 18:47:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:42,192 INFO L482 AbstractCegarLoop]: Abstraction has 7157 states and 21722 transitions. [2021-07-09 18:47:42,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 7157 states and 21722 transitions. [2021-07-09 18:47:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:42,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:42,201 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:42,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:42,401 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:42,402 INFO L82 PathProgramCache]: Analyzing trace with hash 546331358, now seen corresponding path program 88 times [2021-07-09 18:47:42,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:42,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246120510] [2021-07-09 18:47:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:42,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246120510] [2021-07-09 18:47:42,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246120510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961683830] [2021-07-09 18:47:42,779 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:42,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:47:42,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:42,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:42,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:42,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:42,902 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 18:47:42,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:47:43,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:43,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:43,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:43,088 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 18:47:43,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:43,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961683830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:43,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:43,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:43,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103081345] [2021-07-09 18:47:43,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:43,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:43,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:43,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:43,475 INFO L87 Difference]: Start difference. First operand 7157 states and 21722 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:45,797 INFO L93 Difference]: Finished difference Result 9573 states and 28667 transitions. [2021-07-09 18:47:45,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:47:45,797 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:45,813 INFO L225 Difference]: With dead ends: 9573 [2021-07-09 18:47:45,813 INFO L226 Difference]: Without dead ends: 9516 [2021-07-09 18:47:45,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2048.4ms TimeCoverageRelationStatistics Valid=309, Invalid=4247, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:47:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9516 states. [2021-07-09 18:47:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9516 to 7163. [2021-07-09 18:47:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7163 states, 7162 states have (on average 3.0347668249092434) internal successors, (21735), 7162 states have internal predecessors, (21735), 0 states have call successors, (0), 0 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 18:47:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 21735 transitions. [2021-07-09 18:47:45,961 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 21735 transitions. Word has length 48 [2021-07-09 18:47:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:45,961 INFO L482 AbstractCegarLoop]: Abstraction has 7163 states and 21735 transitions. [2021-07-09 18:47:45,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 21735 transitions. [2021-07-09 18:47:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:45,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:45,969 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:46,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-09 18:47:46,181 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:46,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:46,181 INFO L82 PathProgramCache]: Analyzing trace with hash -736816102, now seen corresponding path program 89 times [2021-07-09 18:47:46,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:46,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752530153] [2021-07-09 18:47:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:46,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:46,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752530153] [2021-07-09 18:47:46,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752530153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:46,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230812085] [2021-07-09 18:47:46,558 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:46,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:47:46,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:46,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:47:46,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:46,671 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 18:47:46,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:46,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:46,683 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 18:47:46,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:46,856 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 18:47:46,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:46,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:46,867 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 18:47:46,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230812085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:47,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:47,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:47,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663159782] [2021-07-09 18:47:47,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:47,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:47,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:47,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:47,250 INFO L87 Difference]: Start difference. First operand 7163 states and 21735 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:49,681 INFO L93 Difference]: Finished difference Result 9528 states and 28571 transitions. [2021-07-09 18:47:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:47:49,681 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:49,697 INFO L225 Difference]: With dead ends: 9528 [2021-07-09 18:47:49,697 INFO L226 Difference]: Without dead ends: 9434 [2021-07-09 18:47:49,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 2207.8ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:47:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9434 states. [2021-07-09 18:47:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9434 to 7143. [2021-07-09 18:47:49,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 3.0372444693363203) internal successors, (21692), 7142 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 18:47:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 21692 transitions. [2021-07-09 18:47:49,810 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 21692 transitions. Word has length 48 [2021-07-09 18:47:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:49,810 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 21692 transitions. [2021-07-09 18:47:49,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 21692 transitions. [2021-07-09 18:47:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:49,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:49,819 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:50,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 18:47:50,020 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 925790708, now seen corresponding path program 90 times [2021-07-09 18:47:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863303001] [2021-07-09 18:47:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:50,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:50,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863303001] [2021-07-09 18:47:50,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863303001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:50,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445267371] [2021-07-09 18:47:50,431 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:50,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:50,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:47:50,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:50,544 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 18:47:50,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:50,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:50,555 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 18:47:50,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:47:50,735 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 18:47:50,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:50,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:50,747 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 18:47:50,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:47:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:51,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445267371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:51,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:51,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:51,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186972820] [2021-07-09 18:47:51,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:51,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:51,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:51,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:51,129 INFO L87 Difference]: Start difference. First operand 7143 states and 21692 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:53,533 INFO L93 Difference]: Finished difference Result 9664 states and 28906 transitions. [2021-07-09 18:47:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:53,533 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:53,548 INFO L225 Difference]: With dead ends: 9664 [2021-07-09 18:47:53,548 INFO L226 Difference]: Without dead ends: 9520 [2021-07-09 18:47:53,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2156.9ms TimeCoverageRelationStatistics Valid=324, Invalid=4506, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:47:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2021-07-09 18:47:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 7203. [2021-07-09 18:47:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7203 states, 7202 states have (on average 3.030824770896973) internal successors, (21828), 7202 states have internal predecessors, (21828), 0 states have call successors, (0), 0 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 18:47:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7203 states to 7203 states and 21828 transitions. [2021-07-09 18:47:53,658 INFO L78 Accepts]: Start accepts. Automaton has 7203 states and 21828 transitions. Word has length 48 [2021-07-09 18:47:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:53,658 INFO L482 AbstractCegarLoop]: Abstraction has 7203 states and 21828 transitions. [2021-07-09 18:47:53,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 7203 states and 21828 transitions. [2021-07-09 18:47:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:53,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:53,667 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:53,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 18:47:53,869 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash 951859584, now seen corresponding path program 91 times [2021-07-09 18:47:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460016005] [2021-07-09 18:47:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:54,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460016005] [2021-07-09 18:47:54,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460016005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:54,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331288521] [2021-07-09 18:47:54,277 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:54,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:54,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:54,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:54,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:54,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:54,400 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 18:47:54,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:47:54,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:54,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:54,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:54,587 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 18:47:54,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:54,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331288521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:54,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:54,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:54,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894027678] [2021-07-09 18:47:54,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:54,989 INFO L87 Difference]: Start difference. First operand 7203 states and 21828 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:57,551 INFO L93 Difference]: Finished difference Result 8355 states and 25148 transitions. [2021-07-09 18:47:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:57,551 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:47:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:57,564 INFO L225 Difference]: With dead ends: 8355 [2021-07-09 18:47:57,564 INFO L226 Difference]: Without dead ends: 8315 [2021-07-09 18:47:57,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2474.3ms TimeCoverageRelationStatistics Valid=361, Invalid=4609, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:47:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8315 states. [2021-07-09 18:47:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8315 to 7281. [2021-07-09 18:47:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 3.023214285714286) internal successors, (22009), 7280 states have internal predecessors, (22009), 0 states have call successors, (0), 0 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 18:47:57,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 22009 transitions. [2021-07-09 18:47:57,658 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 22009 transitions. Word has length 48 [2021-07-09 18:47:57,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:57,658 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 22009 transitions. [2021-07-09 18:47:57,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:47:57,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 22009 transitions. [2021-07-09 18:47:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:47:57,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:57,667 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:47:57,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-07-09 18:47:57,867 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash 723100740, now seen corresponding path program 92 times [2021-07-09 18:47:57,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:57,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161308781] [2021-07-09 18:47:57,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:58,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:58,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161308781] [2021-07-09 18:47:58,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161308781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:58,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778706086] [2021-07-09 18:47:58,268 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:58,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:47:58,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:58,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:47:58,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:58,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:58,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:58,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:58,394 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 18:47:58,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:47:58,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:47:58,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:58,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:58,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:47:58,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:47:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:58,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778706086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:58,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:58,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:47:58,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293145252] [2021-07-09 18:47:58,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:47:58,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:58,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:47:58,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:47:58,975 INFO L87 Difference]: Start difference. First operand 7281 states and 22009 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:01,297 INFO L93 Difference]: Finished difference Result 9598 states and 28743 transitions. [2021-07-09 18:48:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:48:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:01,312 INFO L225 Difference]: With dead ends: 9598 [2021-07-09 18:48:01,313 INFO L226 Difference]: Without dead ends: 9553 [2021-07-09 18:48:01,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2181.2ms TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:48:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9553 states. [2021-07-09 18:48:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9553 to 7275. [2021-07-09 18:48:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 7274 states have (on average 3.0230959582073136) internal successors, (21990), 7274 states have internal predecessors, (21990), 0 states have call successors, (0), 0 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 18:48:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 21990 transitions. [2021-07-09 18:48:01,423 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 21990 transitions. Word has length 48 [2021-07-09 18:48:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:01,423 INFO L482 AbstractCegarLoop]: Abstraction has 7275 states and 21990 transitions. [2021-07-09 18:48:01,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 21990 transitions. [2021-07-09 18:48:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:01,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:01,432 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:01,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:01,632 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:01,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:01,632 INFO L82 PathProgramCache]: Analyzing trace with hash -223631060, now seen corresponding path program 93 times [2021-07-09 18:48:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:01,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706661642] [2021-07-09 18:48:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:02,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:02,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706661642] [2021-07-09 18:48:02,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706661642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:02,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964438058] [2021-07-09 18:48:02,011 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:02,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:48:02,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:02,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:02,134 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 18:48:02,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:02,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:02,145 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 18:48:02,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:02,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:02,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:02,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:48:02,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964438058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:02,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045852111] [2021-07-09 18:48:02,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:02,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:02,754 INFO L87 Difference]: Start difference. First operand 7275 states and 21990 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:05,282 INFO L93 Difference]: Finished difference Result 9739 states and 29030 transitions. [2021-07-09 18:48:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:48:05,283 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:05,298 INFO L225 Difference]: With dead ends: 9739 [2021-07-09 18:48:05,298 INFO L226 Difference]: Without dead ends: 9680 [2021-07-09 18:48:05,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 2068.9ms TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:48:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9680 states. [2021-07-09 18:48:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9680 to 7281. [2021-07-09 18:48:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 3.02239010989011) internal successors, (22003), 7280 states have internal predecessors, (22003), 0 states have call successors, (0), 0 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 18:48:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 22003 transitions. [2021-07-09 18:48:05,409 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 22003 transitions. Word has length 48 [2021-07-09 18:48:05,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:05,409 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 22003 transitions. [2021-07-09 18:48:05,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 22003 transitions. [2021-07-09 18:48:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:05,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:05,417 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:05,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:05,622 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash -378068578, now seen corresponding path program 94 times [2021-07-09 18:48:05,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:05,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713850258] [2021-07-09 18:48:05,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:06,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:06,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713850258] [2021-07-09 18:48:06,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713850258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:06,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607458695] [2021-07-09 18:48:06,007 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:06,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:06,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:06,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:06,139 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 18:48:06,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:06,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:06,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:06,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:06,360 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 18:48:06,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:06,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607458695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:06,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:06,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015187244] [2021-07-09 18:48:06,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:06,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:06,742 INFO L87 Difference]: Start difference. First operand 7281 states and 22003 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:09,147 INFO L93 Difference]: Finished difference Result 9686 states and 28917 transitions. [2021-07-09 18:48:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:48:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:09,163 INFO L225 Difference]: With dead ends: 9686 [2021-07-09 18:48:09,163 INFO L226 Difference]: Without dead ends: 9530 [2021-07-09 18:48:09,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 2256.1ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:48:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9530 states. [2021-07-09 18:48:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9530 to 7215. [2021-07-09 18:48:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7215 states, 7214 states have (on average 3.0266149154421957) internal successors, (21834), 7214 states have internal predecessors, (21834), 0 states have call successors, (0), 0 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 18:48:09,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 21834 transitions. [2021-07-09 18:48:09,275 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 21834 transitions. Word has length 48 [2021-07-09 18:48:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:09,275 INFO L482 AbstractCegarLoop]: Abstraction has 7215 states and 21834 transitions. [2021-07-09 18:48:09,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:09,276 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 21834 transitions. [2021-07-09 18:48:09,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:09,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:09,284 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:09,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:09,485 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1901455948, now seen corresponding path program 95 times [2021-07-09 18:48:09,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:09,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937994619] [2021-07-09 18:48:09,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:09,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:09,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937994619] [2021-07-09 18:48:09,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937994619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:09,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927454460] [2021-07-09 18:48:09,866 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:09,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:48:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:48:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:09,982 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 18:48:09,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:09,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:09,994 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 18:48:09,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:10,171 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 18:48:10,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:10,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:10,183 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 18:48:10,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:48:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927454460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:10,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:10,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:10,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696391845] [2021-07-09 18:48:10,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:10,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:10,617 INFO L87 Difference]: Start difference. First operand 7215 states and 21834 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:13,542 INFO L93 Difference]: Finished difference Result 8297 states and 24995 transitions. [2021-07-09 18:48:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:48:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:13,555 INFO L225 Difference]: With dead ends: 8297 [2021-07-09 18:48:13,555 INFO L226 Difference]: Without dead ends: 8257 [2021-07-09 18:48:13,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2538.1ms TimeCoverageRelationStatistics Valid=377, Invalid=4453, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:48:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8257 states. [2021-07-09 18:48:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8257 to 7223. [2021-07-09 18:48:13,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7222 states have (on average 3.0258931044032122) internal successors, (21853), 7222 states have internal predecessors, (21853), 0 states have call successors, (0), 0 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 18:48:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 21853 transitions. [2021-07-09 18:48:13,653 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 21853 transitions. Word has length 48 [2021-07-09 18:48:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:13,653 INFO L482 AbstractCegarLoop]: Abstraction has 7223 states and 21853 transitions. [2021-07-09 18:48:13,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 21853 transitions. [2021-07-09 18:48:13,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:13,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:13,661 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:13,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:13,862 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:13,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:13,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1517328884, now seen corresponding path program 96 times [2021-07-09 18:48:13,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:13,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843606151] [2021-07-09 18:48:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:14,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:14,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843606151] [2021-07-09 18:48:14,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843606151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:14,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648454040] [2021-07-09 18:48:14,239 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:14,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:48:14,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:48:14,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:14,352 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 18:48:14,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:14,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:14,391 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 18:48:14,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:14,567 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 18:48:14,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:14,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:14,578 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 18:48:14,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:48:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:14,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648454040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:14,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:14,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:14,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85545259] [2021-07-09 18:48:14,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:14,973 INFO L87 Difference]: Start difference. First operand 7223 states and 21853 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:17,509 INFO L93 Difference]: Finished difference Result 8263 states and 24926 transitions. [2021-07-09 18:48:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:17,521 INFO L225 Difference]: With dead ends: 8263 [2021-07-09 18:48:17,522 INFO L226 Difference]: Without dead ends: 8224 [2021-07-09 18:48:17,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2307.7ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:48:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8224 states. [2021-07-09 18:48:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8224 to 7219. [2021-07-09 18:48:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 3.0264616237184816) internal successors, (21845), 7218 states have internal predecessors, (21845), 0 states have call successors, (0), 0 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 18:48:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 21845 transitions. [2021-07-09 18:48:17,613 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 21845 transitions. Word has length 48 [2021-07-09 18:48:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:17,613 INFO L482 AbstractCegarLoop]: Abstraction has 7219 states and 21845 transitions. [2021-07-09 18:48:17,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 21845 transitions. [2021-07-09 18:48:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:17,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:17,622 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:17,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:17,822 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1533591052, now seen corresponding path program 97 times [2021-07-09 18:48:17,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:17,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86196939] [2021-07-09 18:48:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:18,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:18,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86196939] [2021-07-09 18:48:18,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86196939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:18,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476848254] [2021-07-09 18:48:18,194 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:18,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:18,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:18,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:18,318 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 18:48:18,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:18,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:18,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:18,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:18,561 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 18:48:18,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:18,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476848254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:18,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:18,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:18,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343335314] [2021-07-09 18:48:18,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:18,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:18,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:18,967 INFO L87 Difference]: Start difference. First operand 7219 states and 21845 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:21,672 INFO L93 Difference]: Finished difference Result 8303 states and 25007 transitions. [2021-07-09 18:48:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:48:21,672 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:21,686 INFO L225 Difference]: With dead ends: 8303 [2021-07-09 18:48:21,686 INFO L226 Difference]: Without dead ends: 8263 [2021-07-09 18:48:21,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2579.7ms TimeCoverageRelationStatistics Valid=377, Invalid=4453, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:48:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-07-09 18:48:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7225. [2021-07-09 18:48:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7225 states, 7224 states have (on average 3.0257475083056478) internal successors, (21858), 7224 states have internal predecessors, (21858), 0 states have call successors, (0), 0 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 18:48:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7225 states to 7225 states and 21858 transitions. [2021-07-09 18:48:21,784 INFO L78 Accepts]: Start accepts. Automaton has 7225 states and 21858 transitions. Word has length 48 [2021-07-09 18:48:21,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:21,784 INFO L482 AbstractCegarLoop]: Abstraction has 7225 states and 21858 transitions. [2021-07-09 18:48:21,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:21,784 INFO L276 IsEmpty]: Start isEmpty. Operand 7225 states and 21858 transitions. [2021-07-09 18:48:21,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:21,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:21,793 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:21,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:21,994 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:21,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:21,994 INFO L82 PathProgramCache]: Analyzing trace with hash 230078878, now seen corresponding path program 98 times [2021-07-09 18:48:21,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:21,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891303304] [2021-07-09 18:48:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:22,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:22,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891303304] [2021-07-09 18:48:22,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891303304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:22,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028131253] [2021-07-09 18:48:22,386 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:22,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:22,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:22,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:22,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:22,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:22,541 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 18:48:22,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:22,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:22,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:22,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:22,727 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 18:48:22,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:23,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028131253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:23,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:23,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:23,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148694278] [2021-07-09 18:48:23,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:23,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:23,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:23,123 INFO L87 Difference]: Start difference. First operand 7225 states and 21858 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:25,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:25,583 INFO L93 Difference]: Finished difference Result 8273 states and 24947 transitions. [2021-07-09 18:48:25,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:25,584 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:25,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:25,596 INFO L225 Difference]: With dead ends: 8273 [2021-07-09 18:48:25,596 INFO L226 Difference]: Without dead ends: 8228 [2021-07-09 18:48:25,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2300.9ms TimeCoverageRelationStatistics Valid=348, Invalid=4344, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:48:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2021-07-09 18:48:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 7219. [2021-07-09 18:48:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 3.0261845386533666) internal successors, (21843), 7218 states have internal predecessors, (21843), 0 states have call successors, (0), 0 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 18:48:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 21843 transitions. [2021-07-09 18:48:25,686 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 21843 transitions. Word has length 48 [2021-07-09 18:48:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:25,686 INFO L482 AbstractCegarLoop]: Abstraction has 7219 states and 21843 transitions. [2021-07-09 18:48:25,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 21843 transitions. [2021-07-09 18:48:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:25,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:25,695 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:25,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-07-09 18:48:25,895 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash 290375220, now seen corresponding path program 99 times [2021-07-09 18:48:25,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:25,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496053360] [2021-07-09 18:48:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:26,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496053360] [2021-07-09 18:48:26,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496053360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322803890] [2021-07-09 18:48:26,266 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:26,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:48:26,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:26,383 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 18:48:26,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:26,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:26,395 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 18:48:26,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:26,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:26,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:26,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:26,679 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 18:48:26,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:27,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322803890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:27,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:27,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:48:27,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989650177] [2021-07-09 18:48:27,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:48:27,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:48:27,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:48:27,061 INFO L87 Difference]: Start difference. First operand 7219 states and 21843 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:48:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:29,663 INFO L93 Difference]: Finished difference Result 9536 states and 28579 transitions. [2021-07-09 18:48:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:48:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:48:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:29,679 INFO L225 Difference]: With dead ends: 9536 [2021-07-09 18:48:29,679 INFO L226 Difference]: Without dead ends: 9501 [2021-07-09 18:48:29,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 2280.9ms TimeCoverageRelationStatistics Valid=353, Invalid=4759, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:48:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9501 states. [2021-07-09 18:48:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9501 to 7223. [2021-07-09 18:48:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7223 states, 7222 states have (on average 3.025616172805317) internal successors, (21851), 7222 states have internal predecessors, (21851), 0 states have call successors, (0), 0 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 18:48:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7223 states to 7223 states and 21851 transitions. [2021-07-09 18:48:29,793 INFO L78 Accepts]: Start accepts. Automaton has 7223 states and 21851 transitions. Word has length 48 [2021-07-09 18:48:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:29,793 INFO L482 AbstractCegarLoop]: Abstraction has 7223 states and 21851 transitions. [2021-07-09 18:48:29,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:48:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7223 states and 21851 transitions. [2021-07-09 18:48:29,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:29,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:29,802 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:30,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-07-09 18:48:30,017 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash -317062540, now seen corresponding path program 100 times [2021-07-09 18:48:30,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:30,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836998088] [2021-07-09 18:48:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:30,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:30,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836998088] [2021-07-09 18:48:30,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836998088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:30,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257386838] [2021-07-09 18:48:30,419 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:30,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:30,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:30,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:30,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:30,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:30,555 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 18:48:30,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:30,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:30,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:30,814 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 18:48:30,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:31,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257386838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:31,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:31,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:31,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7716310] [2021-07-09 18:48:31,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:31,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:31,198 INFO L87 Difference]: Start difference. First operand 7223 states and 21851 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:33,554 INFO L93 Difference]: Finished difference Result 9540 states and 28585 transitions. [2021-07-09 18:48:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:33,569 INFO L225 Difference]: With dead ends: 9540 [2021-07-09 18:48:33,569 INFO L226 Difference]: Without dead ends: 9495 [2021-07-09 18:48:33,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 2228.1ms TimeCoverageRelationStatistics Valid=311, Invalid=4245, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:48:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9495 states. [2021-07-09 18:48:33,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9495 to 7217. [2021-07-09 18:48:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7217 states, 7216 states have (on average 3.026330376940133) internal successors, (21838), 7216 states have internal predecessors, (21838), 0 states have call successors, (0), 0 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 18:48:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7217 states to 7217 states and 21838 transitions. [2021-07-09 18:48:33,682 INFO L78 Accepts]: Start accepts. Automaton has 7217 states and 21838 transitions. Word has length 48 [2021-07-09 18:48:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:33,682 INFO L482 AbstractCegarLoop]: Abstraction has 7217 states and 21838 transitions. [2021-07-09 18:48:33,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 7217 states and 21838 transitions. [2021-07-09 18:48:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:33,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:33,691 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:33,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-09 18:48:33,891 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:33,892 INFO L82 PathProgramCache]: Analyzing trace with hash 220100232, now seen corresponding path program 101 times [2021-07-09 18:48:33,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:33,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353471433] [2021-07-09 18:48:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:34,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:34,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353471433] [2021-07-09 18:48:34,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353471433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:34,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528774574] [2021-07-09 18:48:34,277 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:34,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:48:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:48:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:34,391 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 18:48:34,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:34,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:34,403 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 18:48:34,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:34,584 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 18:48:34,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:34,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:34,595 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 18:48:34,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:48:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:35,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528774574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:35,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:35,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:35,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728495813] [2021-07-09 18:48:35,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:35,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:35,024 INFO L87 Difference]: Start difference. First operand 7217 states and 21838 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:37,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:37,874 INFO L93 Difference]: Finished difference Result 8308 states and 25019 transitions. [2021-07-09 18:48:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:48:37,874 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:37,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:37,887 INFO L225 Difference]: With dead ends: 8308 [2021-07-09 18:48:37,887 INFO L226 Difference]: Without dead ends: 8255 [2021-07-09 18:48:37,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2462.2ms TimeCoverageRelationStatistics Valid=367, Invalid=4603, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:48:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-07-09 18:48:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 7225. [2021-07-09 18:48:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7225 states, 7224 states have (on average 3.024916943521595) internal successors, (21852), 7224 states have internal predecessors, (21852), 0 states have call successors, (0), 0 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 18:48:37,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7225 states to 7225 states and 21852 transitions. [2021-07-09 18:48:37,982 INFO L78 Accepts]: Start accepts. Automaton has 7225 states and 21852 transitions. Word has length 48 [2021-07-09 18:48:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:37,982 INFO L482 AbstractCegarLoop]: Abstraction has 7225 states and 21852 transitions. [2021-07-09 18:48:37,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 7225 states and 21852 transitions. [2021-07-09 18:48:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:37,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:37,991 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:38,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-09 18:48:38,204 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:38,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:38,204 INFO L82 PathProgramCache]: Analyzing trace with hash -656082232, now seen corresponding path program 102 times [2021-07-09 18:48:38,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:38,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116013040] [2021-07-09 18:48:38,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:38,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116013040] [2021-07-09 18:48:38,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116013040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:38,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685473528] [2021-07-09 18:48:38,581 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:38,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:48:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:48:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:38,701 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 18:48:38,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:38,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:38,712 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 18:48:38,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:38,890 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 18:48:38,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:38,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:38,901 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 18:48:38,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:48:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:39,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685473528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:39,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:39,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:39,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149480197] [2021-07-09 18:48:39,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:39,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:39,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:39,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:39,321 INFO L87 Difference]: Start difference. First operand 7225 states and 21852 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:41,595 INFO L93 Difference]: Finished difference Result 9538 states and 28578 transitions. [2021-07-09 18:48:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:41,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:41,611 INFO L225 Difference]: With dead ends: 9538 [2021-07-09 18:48:41,611 INFO L226 Difference]: Without dead ends: 9495 [2021-07-09 18:48:41,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2123.6ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:48:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9495 states. [2021-07-09 18:48:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9495 to 7217. [2021-07-09 18:48:41,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7217 states, 7216 states have (on average 3.0261917960088693) internal successors, (21837), 7216 states have internal predecessors, (21837), 0 states have call successors, (0), 0 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 18:48:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7217 states to 7217 states and 21837 transitions. [2021-07-09 18:48:41,728 INFO L78 Accepts]: Start accepts. Automaton has 7217 states and 21837 transitions. Word has length 48 [2021-07-09 18:48:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:41,728 INFO L482 AbstractCegarLoop]: Abstraction has 7217 states and 21837 transitions. [2021-07-09 18:48:41,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 7217 states and 21837 transitions. [2021-07-09 18:48:41,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:41,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:41,737 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:41,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:41,940 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1935996168, now seen corresponding path program 103 times [2021-07-09 18:48:41,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:41,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162986453] [2021-07-09 18:48:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:42,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162986453] [2021-07-09 18:48:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162986453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665823758] [2021-07-09 18:48:42,326 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:42,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:42,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:42,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:42,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:42,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:42,450 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 18:48:42,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:42,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:42,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:42,639 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 18:48:42,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:43,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665823758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:43,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:43,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178797962] [2021-07-09 18:48:43,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:43,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:43,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:43,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:43,069 INFO L87 Difference]: Start difference. First operand 7217 states and 21837 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:45,909 INFO L93 Difference]: Finished difference Result 8316 states and 25036 transitions. [2021-07-09 18:48:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:48:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:45,923 INFO L225 Difference]: With dead ends: 8316 [2021-07-09 18:48:45,923 INFO L226 Difference]: Without dead ends: 8263 [2021-07-09 18:48:45,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2505.6ms TimeCoverageRelationStatistics Valid=367, Invalid=4603, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:48:45,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2021-07-09 18:48:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7229. [2021-07-09 18:48:46,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7229 states, 7228 states have (on average 3.024764803541782) internal successors, (21863), 7228 states have internal predecessors, (21863), 0 states have call successors, (0), 0 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 18:48:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7229 states to 7229 states and 21863 transitions. [2021-07-09 18:48:46,017 INFO L78 Accepts]: Start accepts. Automaton has 7229 states and 21863 transitions. Word has length 48 [2021-07-09 18:48:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:46,018 INFO L482 AbstractCegarLoop]: Abstraction has 7229 states and 21863 transitions. [2021-07-09 18:48:46,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 7229 states and 21863 transitions. [2021-07-09 18:48:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:46,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:46,026 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:46,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-09 18:48:46,227 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:46,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -172326238, now seen corresponding path program 104 times [2021-07-09 18:48:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:46,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881369669] [2021-07-09 18:48:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:46,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881369669] [2021-07-09 18:48:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881369669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856817257] [2021-07-09 18:48:46,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:46,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:46,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:46,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:46,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:46,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:46,745 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 18:48:46,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:46,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:46,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:46,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:46,933 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 18:48:46,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:47,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856817257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:47,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:47,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:47,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960902469] [2021-07-09 18:48:47,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:47,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:47,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:47,356 INFO L87 Difference]: Start difference. First operand 7229 states and 21863 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:49,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:49,667 INFO L93 Difference]: Finished difference Result 9546 states and 28597 transitions. [2021-07-09 18:48:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:49,667 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:49,682 INFO L225 Difference]: With dead ends: 9546 [2021-07-09 18:48:49,682 INFO L226 Difference]: Without dead ends: 9493 [2021-07-09 18:48:49,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2152.7ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:48:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9493 states. [2021-07-09 18:48:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9493 to 7215. [2021-07-09 18:48:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7215 states, 7214 states have (on average 3.026337676739673) internal successors, (21832), 7214 states have internal predecessors, (21832), 0 states have call successors, (0), 0 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 18:48:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 21832 transitions. [2021-07-09 18:48:49,787 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 21832 transitions. Word has length 48 [2021-07-09 18:48:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:49,788 INFO L482 AbstractCegarLoop]: Abstraction has 7215 states and 21832 transitions. [2021-07-09 18:48:49,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 21832 transitions. [2021-07-09 18:48:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:49,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:49,796 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:49,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:49,996 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash -718024490, now seen corresponding path program 105 times [2021-07-09 18:48:49,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:49,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179046887] [2021-07-09 18:48:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:50,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:50,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179046887] [2021-07-09 18:48:50,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179046887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:50,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31367510] [2021-07-09 18:48:50,379 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:50,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:48:50,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:50,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:50,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:50,499 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 18:48:50,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:50,510 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 18:48:50,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:50,760 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 18:48:50,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:50,771 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 18:48:50,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:48:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:51,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31367510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:51,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:51,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-07-09 18:48:51,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782199741] [2021-07-09 18:48:51,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:48:51,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:48:51,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1677, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:48:51,269 INFO L87 Difference]: Start difference. First operand 7215 states and 21832 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:48:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:54,530 INFO L93 Difference]: Finished difference Result 9808 states and 29584 transitions. [2021-07-09 18:48:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:48:54,530 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:48:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:54,545 INFO L225 Difference]: With dead ends: 9808 [2021-07-09 18:48:54,546 INFO L226 Difference]: Without dead ends: 9768 [2021-07-09 18:48:54,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 2909.9ms TimeCoverageRelationStatistics Valid=480, Invalid=6162, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:48:54,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2021-07-09 18:48:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 7219. [2021-07-09 18:48:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7218 states have (on average 3.0256303685231365) internal successors, (21839), 7218 states have internal predecessors, (21839), 0 states have call successors, (0), 0 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 18:48:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 21839 transitions. [2021-07-09 18:48:54,652 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 21839 transitions. Word has length 48 [2021-07-09 18:48:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:54,652 INFO L482 AbstractCegarLoop]: Abstraction has 7219 states and 21839 transitions. [2021-07-09 18:48:54,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:48:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 21839 transitions. [2021-07-09 18:48:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:54,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:54,660 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:54,861 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1594206954, now seen corresponding path program 106 times [2021-07-09 18:48:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911998279] [2021-07-09 18:48:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:55,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911998279] [2021-07-09 18:48:55,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911998279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067465670] [2021-07-09 18:48:55,267 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:55,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:48:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:55,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:55,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:55,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:55,391 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 18:48:55,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:48:55,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:48:55,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:55,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:55,577 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 18:48:55,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:48:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:55,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067465670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:55,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:55,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:55,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413987508] [2021-07-09 18:48:55,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:55,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:55,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:55,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:55,967 INFO L87 Difference]: Start difference. First operand 7219 states and 21839 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:58,330 INFO L93 Difference]: Finished difference Result 9532 states and 28565 transitions. [2021-07-09 18:48:58,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:48:58,331 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:48:58,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:58,345 INFO L225 Difference]: With dead ends: 9532 [2021-07-09 18:48:58,345 INFO L226 Difference]: Without dead ends: 9485 [2021-07-09 18:48:58,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2121.9ms TimeCoverageRelationStatistics Valid=317, Invalid=4375, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:48:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9485 states. [2021-07-09 18:48:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9485 to 7207. [2021-07-09 18:48:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7207 states, 7206 states have (on average 3.027615875659173) internal successors, (21817), 7206 states have internal predecessors, (21817), 0 states have call successors, (0), 0 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 18:48:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7207 states to 7207 states and 21817 transitions. [2021-07-09 18:48:58,460 INFO L78 Accepts]: Start accepts. Automaton has 7207 states and 21817 transitions. Word has length 48 [2021-07-09 18:48:58,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:58,461 INFO L482 AbstractCegarLoop]: Abstraction has 7207 states and 21817 transitions. [2021-07-09 18:48:58,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:48:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7207 states and 21817 transitions. [2021-07-09 18:48:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:48:58,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:58,469 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:48:58,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:58,670 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:58,670 INFO L82 PathProgramCache]: Analyzing trace with hash 275301940, now seen corresponding path program 107 times [2021-07-09 18:48:58,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:58,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202892840] [2021-07-09 18:48:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:59,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:59,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202892840] [2021-07-09 18:48:59,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202892840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:59,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702780522] [2021-07-09 18:48:59,046 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:59,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:48:59,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:59,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:48:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:59,160 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 18:48:59,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:59,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:59,171 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 18:48:59,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:48:59,374 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 18:48:59,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:59,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:59,386 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 18:48:59,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:48:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:59,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702780522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:59,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:59,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:48:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137737507] [2021-07-09 18:48:59,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:48:59,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:48:59,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:48:59,789 INFO L87 Difference]: Start difference. First operand 7207 states and 21817 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:02,324 INFO L93 Difference]: Finished difference Result 8287 states and 24969 transitions. [2021-07-09 18:49:02,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:49:02,324 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:02,337 INFO L225 Difference]: With dead ends: 8287 [2021-07-09 18:49:02,337 INFO L226 Difference]: Without dead ends: 8247 [2021-07-09 18:49:02,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 2452.2ms TimeCoverageRelationStatistics Valid=367, Invalid=4603, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:49:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2021-07-09 18:49:02,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 7213. [2021-07-09 18:49:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7213 states, 7212 states have (on average 3.026899611758181) internal successors, (21830), 7212 states have internal predecessors, (21830), 0 states have call successors, (0), 0 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 18:49:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7213 states to 7213 states and 21830 transitions. [2021-07-09 18:49:02,428 INFO L78 Accepts]: Start accepts. Automaton has 7213 states and 21830 transitions. Word has length 48 [2021-07-09 18:49:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:02,429 INFO L482 AbstractCegarLoop]: Abstraction has 7213 states and 21830 transitions. [2021-07-09 18:49:02,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:02,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7213 states and 21830 transitions. [2021-07-09 18:49:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:02,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:02,437 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:02,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:02,637 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2038971870, now seen corresponding path program 108 times [2021-07-09 18:49:02,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:02,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624410277] [2021-07-09 18:49:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:03,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:03,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624410277] [2021-07-09 18:49:03,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624410277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:03,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492520713] [2021-07-09 18:49:03,017 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:03,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:49:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:49:03,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:03,133 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 18:49:03,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:03,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:03,145 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 18:49:03,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:03,360 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 18:49:03,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:03,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:03,372 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 18:49:03,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:49:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492520713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:03,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:03,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:49:03,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148667680] [2021-07-09 18:49:03,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:49:03,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:49:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:49:03,849 INFO L87 Difference]: Start difference. First operand 7213 states and 21830 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:49:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:06,403 INFO L93 Difference]: Finished difference Result 9637 states and 28867 transitions. [2021-07-09 18:49:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:49:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:49:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:06,418 INFO L225 Difference]: With dead ends: 9637 [2021-07-09 18:49:06,418 INFO L226 Difference]: Without dead ends: 9549 [2021-07-09 18:49:06,419 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2472.9ms TimeCoverageRelationStatistics Valid=370, Invalid=5330, Unknown=0, NotChecked=0, Total=5700 [2021-07-09 18:49:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9549 states. [2021-07-09 18:49:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9549 to 7155. [2021-07-09 18:49:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.033967011462119) internal successors, (21705), 7154 states have internal predecessors, (21705), 0 states have call successors, (0), 0 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 18:49:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21705 transitions. [2021-07-09 18:49:06,526 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21705 transitions. Word has length 48 [2021-07-09 18:49:06,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:06,526 INFO L482 AbstractCegarLoop]: Abstraction has 7155 states and 21705 transitions. [2021-07-09 18:49:06,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:49:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21705 transitions. [2021-07-09 18:49:06,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:06,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:06,535 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:06,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:06,735 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash 715563068, now seen corresponding path program 109 times [2021-07-09 18:49:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:06,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319505675] [2021-07-09 18:49:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:07,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319505675] [2021-07-09 18:49:07,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319505675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228486211] [2021-07-09 18:49:07,114 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:07,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:07,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:07,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:07,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:07,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:07,248 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 18:49:07,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:07,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:07,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:07,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:07,467 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 18:49:07,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:07,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228486211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:07,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:07,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:07,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239250026] [2021-07-09 18:49:07,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:07,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:07,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:07,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:07,871 INFO L87 Difference]: Start difference. First operand 7155 states and 21705 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:09,847 INFO L93 Difference]: Finished difference Result 8153 states and 24645 transitions. [2021-07-09 18:49:09,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:49:09,847 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:09,859 INFO L225 Difference]: With dead ends: 8153 [2021-07-09 18:49:09,859 INFO L226 Difference]: Without dead ends: 8113 [2021-07-09 18:49:09,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1962.7ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:49:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8113 states. [2021-07-09 18:49:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8113 to 7167. [2021-07-09 18:49:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.0329332961205693) internal successors, (21734), 7166 states have internal predecessors, (21734), 0 states have call successors, (0), 0 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 18:49:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21734 transitions. [2021-07-09 18:49:09,949 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21734 transitions. Word has length 48 [2021-07-09 18:49:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:09,949 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21734 transitions. [2021-07-09 18:49:09,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21734 transitions. [2021-07-09 18:49:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:09,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:09,958 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:10,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:10,158 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:10,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:10,158 INFO L82 PathProgramCache]: Analyzing trace with hash -160619396, now seen corresponding path program 110 times [2021-07-09 18:49:10,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:10,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715348040] [2021-07-09 18:49:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:10,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:10,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715348040] [2021-07-09 18:49:10,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715348040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:10,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046795491] [2021-07-09 18:49:10,543 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:10,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:10,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:10,655 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 18:49:10,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:10,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:10,666 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 18:49:10,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:10,843 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 18:49:10,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:10,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:10,854 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 18:49:10,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:49:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:11,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046795491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:11,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:11,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:11,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930513555] [2021-07-09 18:49:11,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:11,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:11,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:11,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:11,244 INFO L87 Difference]: Start difference. First operand 7167 states and 21734 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:13,050 INFO L93 Difference]: Finished difference Result 9327 states and 28034 transitions. [2021-07-09 18:49:13,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:13,050 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:13,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:13,064 INFO L225 Difference]: With dead ends: 9327 [2021-07-09 18:49:13,064 INFO L226 Difference]: Without dead ends: 9288 [2021-07-09 18:49:13,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1749.9ms TimeCoverageRelationStatistics Valid=238, Invalid=3184, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:49:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9288 states. [2021-07-09 18:49:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9288 to 7163. [2021-07-09 18:49:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7163 states, 7162 states have (on average 3.0330913152750627) internal successors, (21723), 7162 states have internal predecessors, (21723), 0 states have call successors, (0), 0 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 18:49:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 21723 transitions. [2021-07-09 18:49:13,170 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 21723 transitions. Word has length 48 [2021-07-09 18:49:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:13,170 INFO L482 AbstractCegarLoop]: Abstraction has 7163 states and 21723 transitions. [2021-07-09 18:49:13,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 21723 transitions. [2021-07-09 18:49:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:13,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:13,178 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:13,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-09 18:49:13,378 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:13,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:13,379 INFO L82 PathProgramCache]: Analyzing trace with hash -18904256, now seen corresponding path program 111 times [2021-07-09 18:49:13,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:13,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521275320] [2021-07-09 18:49:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:13,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:13,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521275320] [2021-07-09 18:49:13,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521275320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:13,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085000782] [2021-07-09 18:49:13,783 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:13,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:49:13,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:13,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:13,894 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 18:49:13,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:13,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:13,905 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 18:49:13,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:14,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:14,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:14,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:14,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:49:14,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:14,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085000782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:14,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:14,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:14,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986684307] [2021-07-09 18:49:14,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:14,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:14,485 INFO L87 Difference]: Start difference. First operand 7163 states and 21723 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:16,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:16,356 INFO L93 Difference]: Finished difference Result 9511 states and 28479 transitions. [2021-07-09 18:49:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:16,356 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:16,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:16,372 INFO L225 Difference]: With dead ends: 9511 [2021-07-09 18:49:16,372 INFO L226 Difference]: Without dead ends: 9454 [2021-07-09 18:49:16,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1755.9ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9454 states. [2021-07-09 18:49:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9454 to 7169. [2021-07-09 18:49:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7169 states, 7168 states have (on average 3.0323660714285716) internal successors, (21736), 7168 states have internal predecessors, (21736), 0 states have call successors, (0), 0 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 18:49:16,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7169 states to 7169 states and 21736 transitions. [2021-07-09 18:49:16,486 INFO L78 Accepts]: Start accepts. Automaton has 7169 states and 21736 transitions. Word has length 48 [2021-07-09 18:49:16,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:16,486 INFO L482 AbstractCegarLoop]: Abstraction has 7169 states and 21736 transitions. [2021-07-09 18:49:16,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:16,486 INFO L276 IsEmpty]: Start isEmpty. Operand 7169 states and 21736 transitions. [2021-07-09 18:49:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:16,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:16,494 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:16,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-09 18:49:16,695 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:16,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:16,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1302051716, now seen corresponding path program 112 times [2021-07-09 18:49:16,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:16,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833082841] [2021-07-09 18:49:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:17,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833082841] [2021-07-09 18:49:17,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833082841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848774454] [2021-07-09 18:49:17,076 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:17,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:49:17,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:17,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:17,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:17,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:17,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:49:17,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:17,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:17,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:17,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:17,382 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 18:49:17,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:17,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848774454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:17,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:17,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998434712] [2021-07-09 18:49:17,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:17,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:17,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:17,788 INFO L87 Difference]: Start difference. First operand 7169 states and 21736 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:19,454 INFO L93 Difference]: Finished difference Result 9466 states and 28383 transitions. [2021-07-09 18:49:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:19,468 INFO L225 Difference]: With dead ends: 9466 [2021-07-09 18:49:19,468 INFO L226 Difference]: Without dead ends: 9372 [2021-07-09 18:49:19,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-07-09 18:49:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 7149. [2021-07-09 18:49:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7149 states, 7148 states have (on average 3.034834918858422) internal successors, (21693), 7148 states have internal predecessors, (21693), 0 states have call successors, (0), 0 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 18:49:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7149 states to 7149 states and 21693 transitions. [2021-07-09 18:49:19,574 INFO L78 Accepts]: Start accepts. Automaton has 7149 states and 21693 transitions. Word has length 48 [2021-07-09 18:49:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:19,575 INFO L482 AbstractCegarLoop]: Abstraction has 7149 states and 21693 transitions. [2021-07-09 18:49:19,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7149 states and 21693 transitions. [2021-07-09 18:49:19,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:19,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:19,583 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:19,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:19,784 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:19,784 INFO L82 PathProgramCache]: Analyzing trace with hash 386623970, now seen corresponding path program 113 times [2021-07-09 18:49:19,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:19,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586290730] [2021-07-09 18:49:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:20,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:20,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586290730] [2021-07-09 18:49:20,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586290730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:20,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074085219] [2021-07-09 18:49:20,160 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:20,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:49:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:49:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:20,273 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 18:49:20,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:20,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:20,284 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 18:49:20,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:20,464 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 18:49:20,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:20,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:20,476 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 18:49:20,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:49:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:20,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074085219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:20,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:20,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:20,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915126908] [2021-07-09 18:49:20,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:20,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:20,879 INFO L87 Difference]: Start difference. First operand 7149 states and 21693 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:22,951 INFO L93 Difference]: Finished difference Result 8157 states and 24656 transitions. [2021-07-09 18:49:22,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:49:22,952 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:22,965 INFO L225 Difference]: With dead ends: 8157 [2021-07-09 18:49:22,965 INFO L226 Difference]: Without dead ends: 8117 [2021-07-09 18:49:22,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2036.1ms TimeCoverageRelationStatistics Valid=273, Invalid=3387, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:49:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-09 18:49:23,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 7167. [2021-07-09 18:49:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.03349148758024) internal successors, (21738), 7166 states have internal predecessors, (21738), 0 states have call successors, (0), 0 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 18:49:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21738 transitions. [2021-07-09 18:49:23,057 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21738 transitions. Word has length 48 [2021-07-09 18:49:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:23,057 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21738 transitions. [2021-07-09 18:49:23,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21738 transitions. [2021-07-09 18:49:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:23,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:23,066 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:23,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-09 18:49:23,266 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash 157865126, now seen corresponding path program 114 times [2021-07-09 18:49:23,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:23,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330899344] [2021-07-09 18:49:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:23,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:23,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330899344] [2021-07-09 18:49:23,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330899344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:23,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133300690] [2021-07-09 18:49:23,672 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:23,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:49:23,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:23,785 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 18:49:23,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:23,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:23,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:49:23,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:23,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:23,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:23,986 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 18:49:23,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:24,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133300690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:24,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:24,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:24,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601776892] [2021-07-09 18:49:24,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:24,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:24,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:24,377 INFO L87 Difference]: Start difference. First operand 7167 states and 21738 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:26,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:26,074 INFO L93 Difference]: Finished difference Result 9331 states and 28046 transitions. [2021-07-09 18:49:26,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:26,075 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:26,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:26,089 INFO L225 Difference]: With dead ends: 9331 [2021-07-09 18:49:26,089 INFO L226 Difference]: Without dead ends: 9286 [2021-07-09 18:49:26,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1769.8ms TimeCoverageRelationStatistics Valid=238, Invalid=3184, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:49:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2021-07-09 18:49:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 7161. [2021-07-09 18:49:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0333798882681564) internal successors, (21719), 7160 states have internal predecessors, (21719), 0 states have call successors, (0), 0 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 18:49:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21719 transitions. [2021-07-09 18:49:26,194 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21719 transitions. Word has length 48 [2021-07-09 18:49:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:26,194 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21719 transitions. [2021-07-09 18:49:26,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21719 transitions. [2021-07-09 18:49:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:26,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:26,202 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:26,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:26,405 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:26,406 INFO L82 PathProgramCache]: Analyzing trace with hash -788866674, now seen corresponding path program 115 times [2021-07-09 18:49:26,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:26,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866735091] [2021-07-09 18:49:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:26,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866735091] [2021-07-09 18:49:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866735091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457080302] [2021-07-09 18:49:26,787 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:26,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:26,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:26,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:26,916 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 18:49:26,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:27,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:27,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:27,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:27,103 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 18:49:27,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457080302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:27,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:27,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:27,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747850190] [2021-07-09 18:49:27,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:27,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:27,514 INFO L87 Difference]: Start difference. First operand 7161 states and 21719 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:29,271 INFO L93 Difference]: Finished difference Result 9509 states and 28478 transitions. [2021-07-09 18:49:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:29,271 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:29,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:29,286 INFO L225 Difference]: With dead ends: 9509 [2021-07-09 18:49:29,286 INFO L226 Difference]: Without dead ends: 9450 [2021-07-09 18:49:29,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1700.9ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9450 states. [2021-07-09 18:49:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9450 to 7167. [2021-07-09 18:49:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.032654200390734) internal successors, (21732), 7166 states have internal predecessors, (21732), 0 states have call successors, (0), 0 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 18:49:29,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21732 transitions. [2021-07-09 18:49:29,404 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21732 transitions. Word has length 48 [2021-07-09 18:49:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:29,404 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21732 transitions. [2021-07-09 18:49:29,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21732 transitions. [2021-07-09 18:49:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:29,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:29,413 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:29,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-07-09 18:49:29,613 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash -943304192, now seen corresponding path program 116 times [2021-07-09 18:49:29,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:29,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259766073] [2021-07-09 18:49:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:29,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259766073] [2021-07-09 18:49:29,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259766073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145460333] [2021-07-09 18:49:29,989 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:30,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:30,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:30,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:30,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:30,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:30,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:30,112 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 18:49:30,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:30,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:30,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:30,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:30,293 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 18:49:30,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:30,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145460333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:30,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:30,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:30,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340926104] [2021-07-09 18:49:30,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:30,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:30,671 INFO L87 Difference]: Start difference. First operand 7167 states and 21732 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:32,479 INFO L93 Difference]: Finished difference Result 9456 states and 28365 transitions. [2021-07-09 18:49:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:32,480 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:32,494 INFO L225 Difference]: With dead ends: 9456 [2021-07-09 18:49:32,494 INFO L226 Difference]: Without dead ends: 9300 [2021-07-09 18:49:32,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1676.3ms TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:32,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9300 states. [2021-07-09 18:49:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9300 to 7101. [2021-07-09 18:49:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.0370422535211268) internal successors, (21563), 7100 states have internal predecessors, (21563), 0 states have call successors, (0), 0 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 18:49:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21563 transitions. [2021-07-09 18:49:32,598 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21563 transitions. Word has length 48 [2021-07-09 18:49:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:32,598 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21563 transitions. [2021-07-09 18:49:32,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21563 transitions. [2021-07-09 18:49:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:32,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:32,606 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:32,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:32,807 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1828275734, now seen corresponding path program 117 times [2021-07-09 18:49:32,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:32,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724339095] [2021-07-09 18:49:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:33,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:33,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724339095] [2021-07-09 18:49:33,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724339095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:33,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56285115] [2021-07-09 18:49:33,188 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:33,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:49:33,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:33,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:33,341 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 18:49:33,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:33,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:33,353 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 18:49:33,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:33,539 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 18:49:33,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:33,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:33,551 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 18:49:33,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:49:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:33,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56285115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:33,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:33,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:33,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284911840] [2021-07-09 18:49:33,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:33,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:33,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:33,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:33,956 INFO L87 Difference]: Start difference. First operand 7101 states and 21563 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:36,177 INFO L93 Difference]: Finished difference Result 8099 states and 24503 transitions. [2021-07-09 18:49:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:49:36,177 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:36,190 INFO L225 Difference]: With dead ends: 8099 [2021-07-09 18:49:36,190 INFO L226 Difference]: Without dead ends: 8059 [2021-07-09 18:49:36,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2006.1ms TimeCoverageRelationStatistics Valid=283, Invalid=3257, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:49:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-07-09 18:49:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 7109. [2021-07-09 18:49:36,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.0362971299943724) internal successors, (21582), 7108 states have internal predecessors, (21582), 0 states have call successors, (0), 0 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 18:49:36,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21582 transitions. [2021-07-09 18:49:36,280 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21582 transitions. Word has length 48 [2021-07-09 18:49:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:36,281 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21582 transitions. [2021-07-09 18:49:36,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21582 transitions. [2021-07-09 18:49:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:36,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:36,289 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:36,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-09 18:49:36,489 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash 952093270, now seen corresponding path program 118 times [2021-07-09 18:49:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:36,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787744367] [2021-07-09 18:49:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:36,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:36,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787744367] [2021-07-09 18:49:36,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787744367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:36,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899672102] [2021-07-09 18:49:36,883 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:36,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:49:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:37,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:37,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:37,024 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 18:49:37,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:37,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:37,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:37,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:37,212 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 18:49:37,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:37,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899672102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:37,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:37,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:37,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419531229] [2021-07-09 18:49:37,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:37,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:37,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:37,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:37,644 INFO L87 Difference]: Start difference. First operand 7109 states and 21582 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:39,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:39,548 INFO L93 Difference]: Finished difference Result 8065 states and 24434 transitions. [2021-07-09 18:49:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:49:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:39,559 INFO L225 Difference]: With dead ends: 8065 [2021-07-09 18:49:39,560 INFO L226 Difference]: Without dead ends: 8026 [2021-07-09 18:49:39,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1941.2ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:49:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-07-09 18:49:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7105. [2021-07-09 18:49:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.036880630630631) internal successors, (21574), 7104 states have internal predecessors, (21574), 0 states have call successors, (0), 0 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 18:49:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21574 transitions. [2021-07-09 18:49:39,654 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21574 transitions. Word has length 48 [2021-07-09 18:49:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:39,654 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21574 transitions. [2021-07-09 18:49:39,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21574 transitions. [2021-07-09 18:49:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:39,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:39,664 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:39,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:39,864 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:39,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2098826666, now seen corresponding path program 119 times [2021-07-09 18:49:39,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:39,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207499352] [2021-07-09 18:49:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:40,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:40,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207499352] [2021-07-09 18:49:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207499352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:40,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552282730] [2021-07-09 18:49:40,244 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:40,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:49:40,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:40,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:49:40,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:40,357 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 18:49:40,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:40,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:40,368 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 18:49:40,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:40,545 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 18:49:40,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:40,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:40,556 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 18:49:40,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:49:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:40,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552282730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:40,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:40,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:40,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274982095] [2021-07-09 18:49:40,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:40,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:40,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:40,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:40,962 INFO L87 Difference]: Start difference. First operand 7105 states and 21574 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:43,208 INFO L93 Difference]: Finished difference Result 8105 states and 24515 transitions. [2021-07-09 18:49:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:49:43,208 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:43,220 INFO L225 Difference]: With dead ends: 8105 [2021-07-09 18:49:43,221 INFO L226 Difference]: Without dead ends: 8065 [2021-07-09 18:49:43,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 2060.5ms TimeCoverageRelationStatistics Valid=283, Invalid=3257, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:49:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-07-09 18:49:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7111. [2021-07-09 18:49:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.0361462728551336) internal successors, (21587), 7110 states have internal predecessors, (21587), 0 states have call successors, (0), 0 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 18:49:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21587 transitions. [2021-07-09 18:49:43,332 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21587 transitions. Word has length 48 [2021-07-09 18:49:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:43,332 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21587 transitions. [2021-07-09 18:49:43,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21587 transitions. [2021-07-09 18:49:43,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:43,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:43,341 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:43,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:43,541 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash -335156736, now seen corresponding path program 120 times [2021-07-09 18:49:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440844230] [2021-07-09 18:49:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440844230] [2021-07-09 18:49:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440844230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190295385] [2021-07-09 18:49:43,921 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:43,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:49:43,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:43,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:43,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:44,033 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 18:49:44,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:44,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:44,045 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 18:49:44,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:44,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:44,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:44,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:44,231 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 18:49:44,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:44,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190295385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:44,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:44,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:44,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283318586] [2021-07-09 18:49:44,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:44,634 INFO L87 Difference]: Start difference. First operand 7111 states and 21587 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:46,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:46,546 INFO L93 Difference]: Finished difference Result 8075 states and 24455 transitions. [2021-07-09 18:49:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:49:46,546 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:46,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:46,558 INFO L225 Difference]: With dead ends: 8075 [2021-07-09 18:49:46,558 INFO L226 Difference]: Without dead ends: 8030 [2021-07-09 18:49:46,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1876.0ms TimeCoverageRelationStatistics Valid=260, Invalid=3162, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:49:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8030 states. [2021-07-09 18:49:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8030 to 7105. [2021-07-09 18:49:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.036599099099099) internal successors, (21572), 7104 states have internal predecessors, (21572), 0 states have call successors, (0), 0 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 18:49:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21572 transitions. [2021-07-09 18:49:46,649 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21572 transitions. Word has length 48 [2021-07-09 18:49:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:46,649 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21572 transitions. [2021-07-09 18:49:46,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21572 transitions. [2021-07-09 18:49:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:46,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:46,657 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:46,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 18:49:46,858 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:46,858 INFO L82 PathProgramCache]: Analyzing trace with hash -274860394, now seen corresponding path program 121 times [2021-07-09 18:49:46,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:46,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755341055] [2021-07-09 18:49:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:47,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:47,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755341055] [2021-07-09 18:49:47,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755341055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:47,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101414042] [2021-07-09 18:49:47,227 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:47,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:47,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:47,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:47,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:47,351 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 18:49:47,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:47,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:47,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:47,567 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 18:49:47,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101414042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:47,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:47,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396050935] [2021-07-09 18:49:47,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:47,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:47,954 INFO L87 Difference]: Start difference. First operand 7105 states and 21572 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:48,642 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-07-09 18:49:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:49,871 INFO L93 Difference]: Finished difference Result 9269 states and 27882 transitions. [2021-07-09 18:49:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:49:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:49,885 INFO L225 Difference]: With dead ends: 9269 [2021-07-09 18:49:49,886 INFO L226 Difference]: Without dead ends: 9234 [2021-07-09 18:49:49,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1834.5ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9234 states. [2021-07-09 18:49:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9234 to 7109. [2021-07-09 18:49:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.036015756893641) internal successors, (21580), 7108 states have internal predecessors, (21580), 0 states have call successors, (0), 0 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 18:49:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21580 transitions. [2021-07-09 18:49:49,992 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21580 transitions. Word has length 48 [2021-07-09 18:49:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:49,992 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21580 transitions. [2021-07-09 18:49:49,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21580 transitions. [2021-07-09 18:49:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:50,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:50,001 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:50,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-09 18:49:50,201 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:50,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:50,201 INFO L82 PathProgramCache]: Analyzing trace with hash -882298154, now seen corresponding path program 122 times [2021-07-09 18:49:50,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:50,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701454681] [2021-07-09 18:49:50,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:50,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:50,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701454681] [2021-07-09 18:49:50,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701454681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:50,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608156348] [2021-07-09 18:49:50,609 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:50,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:49:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:50,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:50,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:50,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:50,750 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 18:49:50,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:50,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:50,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:50,937 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 18:49:50,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:51,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608156348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:51,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:51,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:51,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878425919] [2021-07-09 18:49:51,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:51,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:51,342 INFO L87 Difference]: Start difference. First operand 7109 states and 21580 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:53,127 INFO L93 Difference]: Finished difference Result 9273 states and 27888 transitions. [2021-07-09 18:49:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:49:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:53,142 INFO L225 Difference]: With dead ends: 9273 [2021-07-09 18:49:53,142 INFO L226 Difference]: Without dead ends: 9228 [2021-07-09 18:49:53,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1772.6ms TimeCoverageRelationStatistics Valid=233, Invalid=3073, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:49:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2021-07-09 18:49:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 7103. [2021-07-09 18:49:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 3.03675021120811) internal successors, (21567), 7102 states have internal predecessors, (21567), 0 states have call successors, (0), 0 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 18:49:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 21567 transitions. [2021-07-09 18:49:53,248 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 21567 transitions. Word has length 48 [2021-07-09 18:49:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:53,249 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 21567 transitions. [2021-07-09 18:49:53,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 21567 transitions. [2021-07-09 18:49:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:53,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:53,257 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:53,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 18:49:53,457 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -345135382, now seen corresponding path program 123 times [2021-07-09 18:49:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:53,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488381201] [2021-07-09 18:49:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:53,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:53,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488381201] [2021-07-09 18:49:53,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488381201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:53,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859125577] [2021-07-09 18:49:53,866 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:49:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:53,987 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 18:49:53,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:54,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:54,001 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 18:49:54,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:49:54,181 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 18:49:54,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:54,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:54,193 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 18:49:54,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:49:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:54,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859125577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:54,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:54,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923558235] [2021-07-09 18:49:54,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:54,590 INFO L87 Difference]: Start difference. First operand 7103 states and 21567 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:56,578 INFO L93 Difference]: Finished difference Result 8110 states and 24527 transitions. [2021-07-09 18:49:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:49:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:56,591 INFO L225 Difference]: With dead ends: 8110 [2021-07-09 18:49:56,591 INFO L226 Difference]: Without dead ends: 8057 [2021-07-09 18:49:56,591 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1974.9ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:49:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2021-07-09 18:49:56,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 7111. [2021-07-09 18:49:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.0353023909985937) internal successors, (21581), 7110 states have internal predecessors, (21581), 0 states have call successors, (0), 0 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 18:49:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21581 transitions. [2021-07-09 18:49:56,681 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21581 transitions. Word has length 48 [2021-07-09 18:49:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:56,681 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21581 transitions. [2021-07-09 18:49:56,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21581 transitions. [2021-07-09 18:49:56,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:56,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:56,689 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:56,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 18:49:56,890 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:56,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1221317846, now seen corresponding path program 124 times [2021-07-09 18:49:56,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:56,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125567285] [2021-07-09 18:49:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:57,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125567285] [2021-07-09 18:49:57,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125567285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229805906] [2021-07-09 18:49:57,268 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:57,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:49:57,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:57,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:49:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:57,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:57,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:57,391 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 18:49:57,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:49:57,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:49:57,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:57,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:57,591 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 18:49:57,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:49:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:58,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229805906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:58,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:58,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:49:58,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686141765] [2021-07-09 18:49:58,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:49:58,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:49:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:49:58,013 INFO L87 Difference]: Start difference. First operand 7111 states and 21581 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:59,610 INFO L93 Difference]: Finished difference Result 9271 states and 27881 transitions. [2021-07-09 18:49:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:49:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:49:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:59,633 INFO L225 Difference]: With dead ends: 9271 [2021-07-09 18:49:59,633 INFO L226 Difference]: Without dead ends: 9228 [2021-07-09 18:49:59,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1731.0ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:49:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2021-07-09 18:49:59,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 7103. [2021-07-09 18:49:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7103 states, 7102 states have (on average 3.0366094058011828) internal successors, (21566), 7102 states have internal predecessors, (21566), 0 states have call successors, (0), 0 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 18:49:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7103 states to 7103 states and 21566 transitions. [2021-07-09 18:49:59,783 INFO L78 Accepts]: Start accepts. Automaton has 7103 states and 21566 transitions. Word has length 48 [2021-07-09 18:49:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:59,783 INFO L482 AbstractCegarLoop]: Abstraction has 7103 states and 21566 transitions. [2021-07-09 18:49:59,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:49:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 7103 states and 21566 transitions. [2021-07-09 18:49:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:49:59,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:59,792 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:49:59,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 18:49:59,992 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:59,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:59,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1793735514, now seen corresponding path program 125 times [2021-07-09 18:49:59,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:59,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584892447] [2021-07-09 18:49:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:00,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584892447] [2021-07-09 18:50:00,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584892447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:00,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486899478] [2021-07-09 18:50:00,375 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:00,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:50:00,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:00,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:50:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:00,496 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 18:50:00,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:00,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:00,507 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 18:50:00,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:00,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:50:00,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:00,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:00,706 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 18:50:00,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:01,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486899478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:01,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:01,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:01,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926291508] [2021-07-09 18:50:01,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:01,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:01,112 INFO L87 Difference]: Start difference. First operand 7103 states and 21566 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:03,241 INFO L93 Difference]: Finished difference Result 8118 states and 24544 transitions. [2021-07-09 18:50:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:03,255 INFO L225 Difference]: With dead ends: 8118 [2021-07-09 18:50:03,255 INFO L226 Difference]: Without dead ends: 8065 [2021-07-09 18:50:03,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2014.2ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2021-07-09 18:50:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 7115. [2021-07-09 18:50:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 3.0351419735732357) internal successors, (21592), 7114 states have internal predecessors, (21592), 0 states have call successors, (0), 0 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 18:50:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 21592 transitions. [2021-07-09 18:50:03,358 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 21592 transitions. Word has length 48 [2021-07-09 18:50:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:03,358 INFO L482 AbstractCegarLoop]: Abstraction has 7115 states and 21592 transitions. [2021-07-09 18:50:03,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 21592 transitions. [2021-07-09 18:50:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:03,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:03,367 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:03,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-07-09 18:50:03,568 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash -737561852, now seen corresponding path program 126 times [2021-07-09 18:50:03,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:03,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020067795] [2021-07-09 18:50:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:03,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:03,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020067795] [2021-07-09 18:50:03,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020067795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:03,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127682891] [2021-07-09 18:50:03,986 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:04,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:50:04,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:04,104 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 18:50:04,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:04,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:04,116 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 18:50:04,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:04,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:04,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:04,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:04,314 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 18:50:04,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:50:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127682891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:04,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:04,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:04,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685349847] [2021-07-09 18:50:04,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:04,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:04,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:04,739 INFO L87 Difference]: Start difference. First operand 7115 states and 21592 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:06,673 INFO L93 Difference]: Finished difference Result 9279 states and 27900 transitions. [2021-07-09 18:50:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:06,688 INFO L225 Difference]: With dead ends: 9279 [2021-07-09 18:50:06,689 INFO L226 Difference]: Without dead ends: 9226 [2021-07-09 18:50:06,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1810.6ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:50:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9226 states. [2021-07-09 18:50:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9226 to 7101. [2021-07-09 18:50:06,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.0367605633802817) internal successors, (21561), 7100 states have internal predecessors, (21561), 0 states have call successors, (0), 0 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 18:50:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21561 transitions. [2021-07-09 18:50:06,804 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21561 transitions. Word has length 48 [2021-07-09 18:50:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:06,804 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21561 transitions. [2021-07-09 18:50:06,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21561 transitions. [2021-07-09 18:50:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:06,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:06,812 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:07,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:07,013 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:07,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:07,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1283260104, now seen corresponding path program 127 times [2021-07-09 18:50:07,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:07,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809437498] [2021-07-09 18:50:07,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:07,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:07,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809437498] [2021-07-09 18:50:07,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809437498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:07,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632790177] [2021-07-09 18:50:07,402 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:07,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:07,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:07,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:07,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:07,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:07,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:50:07,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:50:07,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:07,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:07,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:07,729 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 18:50:07,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:50:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:08,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632790177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:08,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:08,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:08,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483975005] [2021-07-09 18:50:08,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:08,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:08,197 INFO L87 Difference]: Start difference. First operand 7101 states and 21561 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:10,259 INFO L93 Difference]: Finished difference Result 8091 states and 24479 transitions. [2021-07-09 18:50:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:10,271 INFO L225 Difference]: With dead ends: 8091 [2021-07-09 18:50:10,271 INFO L226 Difference]: Without dead ends: 8051 [2021-07-09 18:50:10,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2061.0ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-07-09 18:50:10,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 7105. [2021-07-09 18:50:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.036036036036036) internal successors, (21568), 7104 states have internal predecessors, (21568), 0 states have call successors, (0), 0 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 18:50:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21568 transitions. [2021-07-09 18:50:10,359 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21568 transitions. Word has length 48 [2021-07-09 18:50:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:10,359 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21568 transitions. [2021-07-09 18:50:10,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21568 transitions. [2021-07-09 18:50:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:10,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:10,368 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:10,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-09 18:50:10,568 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2135524728, now seen corresponding path program 128 times [2021-07-09 18:50:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756697052] [2021-07-09 18:50:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:10,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756697052] [2021-07-09 18:50:10,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756697052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:10,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298059603] [2021-07-09 18:50:10,948 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:10,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:10,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:10,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:11,072 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 18:50:11,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:11,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:11,083 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 18:50:11,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:11,265 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 18:50:11,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:11,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:11,281 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 18:50:11,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:11,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298059603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:11,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:11,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:11,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859170289] [2021-07-09 18:50:11,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:11,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:11,709 INFO L87 Difference]: Start difference. First operand 7105 states and 21568 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:13,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:13,595 INFO L93 Difference]: Finished difference Result 9265 states and 27868 transitions. [2021-07-09 18:50:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:13,595 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:13,611 INFO L225 Difference]: With dead ends: 9265 [2021-07-09 18:50:13,611 INFO L226 Difference]: Without dead ends: 9218 [2021-07-09 18:50:13,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1777.1ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:50:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-09 18:50:13,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 7093. [2021-07-09 18:50:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7093 states, 7092 states have (on average 3.0380710659898478) internal successors, (21546), 7092 states have internal predecessors, (21546), 0 states have call successors, (0), 0 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 18:50:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7093 states to 7093 states and 21546 transitions. [2021-07-09 18:50:13,734 INFO L78 Accepts]: Start accepts. Automaton has 7093 states and 21546 transitions. Word has length 48 [2021-07-09 18:50:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:13,734 INFO L482 AbstractCegarLoop]: Abstraction has 7093 states and 21546 transitions. [2021-07-09 18:50:13,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7093 states and 21546 transitions. [2021-07-09 18:50:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:13,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:13,743 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:13,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:13,944 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:13,944 INFO L82 PathProgramCache]: Analyzing trace with hash -289933674, now seen corresponding path program 129 times [2021-07-09 18:50:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227662180] [2021-07-09 18:50:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:14,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:14,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227662180] [2021-07-09 18:50:14,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227662180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:14,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280395983] [2021-07-09 18:50:14,382 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:14,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:50:14,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:14,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:14,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:14,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:14,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:14,528 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 18:50:14,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:50:14,727 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 18:50:14,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:14,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:14,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:50:14,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:15,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280395983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:15,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:15,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:15,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861984596] [2021-07-09 18:50:15,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:15,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:15,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:15,171 INFO L87 Difference]: Start difference. First operand 7093 states and 21546 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:17,280 INFO L93 Difference]: Finished difference Result 8089 states and 24477 transitions. [2021-07-09 18:50:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:17,281 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:17,294 INFO L225 Difference]: With dead ends: 8089 [2021-07-09 18:50:17,294 INFO L226 Difference]: Without dead ends: 8049 [2021-07-09 18:50:17,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2170.7ms TimeCoverageRelationStatistics Valid=278, Invalid=3382, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8049 states. [2021-07-09 18:50:17,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8049 to 7099. [2021-07-09 18:50:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 3.0373344604113837) internal successors, (21559), 7098 states have internal predecessors, (21559), 0 states have call successors, (0), 0 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 18:50:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 21559 transitions. [2021-07-09 18:50:17,385 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 21559 transitions. Word has length 48 [2021-07-09 18:50:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:17,385 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 21559 transitions. [2021-07-09 18:50:17,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 21559 transitions. [2021-07-09 18:50:17,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:17,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:17,394 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:17,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:17,594 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:17,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:17,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1473736256, now seen corresponding path program 130 times [2021-07-09 18:50:17,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:17,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672590159] [2021-07-09 18:50:17,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:17,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672590159] [2021-07-09 18:50:17,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672590159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:17,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849272976] [2021-07-09 18:50:17,976 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:18,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:18,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:18,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:18,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:18,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:18,104 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 18:50:18,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:50:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:18,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:18,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:18,300 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 18:50:18,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:50:18,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:18,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849272976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:18,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:18,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:18,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533912819] [2021-07-09 18:50:18,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:18,731 INFO L87 Difference]: Start difference. First operand 7099 states and 21559 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:20,629 INFO L93 Difference]: Finished difference Result 9263 states and 27867 transitions. [2021-07-09 18:50:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:20,629 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:20,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:20,643 INFO L225 Difference]: With dead ends: 9263 [2021-07-09 18:50:20,643 INFO L226 Difference]: Without dead ends: 9175 [2021-07-09 18:50:20,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1788.8ms TimeCoverageRelationStatistics Valid=239, Invalid=3183, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:50:20,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-07-09 18:50:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 7050. [2021-07-09 18:50:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7050 states, 7049 states have (on average 3.0436941410129097) internal successors, (21455), 7049 states have internal predecessors, (21455), 0 states have call successors, (0), 0 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 18:50:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7050 states to 7050 states and 21455 transitions. [2021-07-09 18:50:20,746 INFO L78 Accepts]: Start accepts. Automaton has 7050 states and 21455 transitions. Word has length 48 [2021-07-09 18:50:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:20,746 INFO L482 AbstractCegarLoop]: Abstraction has 7050 states and 21455 transitions. [2021-07-09 18:50:20,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7050 states and 21455 transitions. [2021-07-09 18:50:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:20,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:20,754 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:20,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-09 18:50:20,955 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:20,955 INFO L82 PathProgramCache]: Analyzing trace with hash -527523750, now seen corresponding path program 131 times [2021-07-09 18:50:20,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:20,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888835940] [2021-07-09 18:50:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:21,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888835940] [2021-07-09 18:50:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888835940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:21,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033236392] [2021-07-09 18:50:21,335 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:21,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:50:21,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:21,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:50:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:21,451 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 18:50:21,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:21,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:21,462 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 18:50:21,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:21,639 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 18:50:21,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:21,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:21,651 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 18:50:21,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033236392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:22,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:22,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:22,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235173287] [2021-07-09 18:50:22,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:22,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:22,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:22,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:22,089 INFO L87 Difference]: Start difference. First operand 7050 states and 21455 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:23,832 INFO L93 Difference]: Finished difference Result 9400 states and 28252 transitions. [2021-07-09 18:50:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:23,847 INFO L225 Difference]: With dead ends: 9400 [2021-07-09 18:50:23,847 INFO L226 Difference]: Without dead ends: 9282 [2021-07-09 18:50:23,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1787.9ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:50:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9282 states. [2021-07-09 18:50:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9282 to 7070. [2021-07-09 18:50:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7070 states, 7069 states have (on average 3.040599801952186) internal successors, (21494), 7069 states have internal predecessors, (21494), 0 states have call successors, (0), 0 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 18:50:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7070 states to 7070 states and 21494 transitions. [2021-07-09 18:50:23,957 INFO L78 Accepts]: Start accepts. Automaton has 7070 states and 21494 transitions. Word has length 48 [2021-07-09 18:50:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:23,957 INFO L482 AbstractCegarLoop]: Abstraction has 7070 states and 21494 transitions. [2021-07-09 18:50:23,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 7070 states and 21494 transitions. [2021-07-09 18:50:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:23,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:23,965 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:24,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:24,166 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:24,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:24,166 INFO L82 PathProgramCache]: Analyzing trace with hash -420073382, now seen corresponding path program 132 times [2021-07-09 18:50:24,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:24,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812278468] [2021-07-09 18:50:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:24,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:24,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812278468] [2021-07-09 18:50:24,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812278468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:24,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30521053] [2021-07-09 18:50:24,592 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:24,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:50:24,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:50:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:24,708 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 18:50:24,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:24,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:24,720 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 18:50:24,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:24,909 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 18:50:24,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:24,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:24,920 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 18:50:24,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30521053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:25,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:25,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:25,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008599131] [2021-07-09 18:50:25,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:25,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:25,380 INFO L87 Difference]: Start difference. First operand 7070 states and 21494 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:27,554 INFO L93 Difference]: Finished difference Result 8068 states and 24434 transitions. [2021-07-09 18:50:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:27,554 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:27,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:27,567 INFO L225 Difference]: With dead ends: 8068 [2021-07-09 18:50:27,567 INFO L226 Difference]: Without dead ends: 8028 [2021-07-09 18:50:27,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2110.2ms TimeCoverageRelationStatistics Valid=278, Invalid=3628, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:50:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2021-07-09 18:50:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 7082. [2021-07-09 18:50:27,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7082 states, 7081 states have (on average 3.0395424375088265) internal successors, (21523), 7081 states have internal predecessors, (21523), 0 states have call successors, (0), 0 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 18:50:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7082 states to 7082 states and 21523 transitions. [2021-07-09 18:50:27,669 INFO L78 Accepts]: Start accepts. Automaton has 7082 states and 21523 transitions. Word has length 48 [2021-07-09 18:50:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:27,669 INFO L482 AbstractCegarLoop]: Abstraction has 7082 states and 21523 transitions. [2021-07-09 18:50:27,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 7082 states and 21523 transitions. [2021-07-09 18:50:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:27,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:27,679 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:27,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 18:50:27,879 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:27,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1296255846, now seen corresponding path program 133 times [2021-07-09 18:50:27,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:27,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473629983] [2021-07-09 18:50:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:28,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:28,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473629983] [2021-07-09 18:50:28,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473629983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:28,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920532934] [2021-07-09 18:50:28,272 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:28,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:28,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:28,396 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 18:50:28,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:28,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:28,408 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 18:50:28,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:28,609 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 18:50:28,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:28,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:28,621 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 18:50:28,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:29,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920532934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:29,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:29,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:29,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156347867] [2021-07-09 18:50:29,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:29,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:29,109 INFO L87 Difference]: Start difference. First operand 7082 states and 21523 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:30,866 INFO L93 Difference]: Finished difference Result 9255 states and 27854 transitions. [2021-07-09 18:50:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:30,866 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:30,880 INFO L225 Difference]: With dead ends: 9255 [2021-07-09 18:50:30,880 INFO L226 Difference]: Without dead ends: 9216 [2021-07-09 18:50:30,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1886.2ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2021-07-09 18:50:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 7078. [2021-07-09 18:50:30,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7077 states have (on average 3.039706090151194) internal successors, (21512), 7077 states have internal predecessors, (21512), 0 states have call successors, (0), 0 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 18:50:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 21512 transitions. [2021-07-09 18:50:30,985 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 21512 transitions. Word has length 48 [2021-07-09 18:50:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:30,985 INFO L482 AbstractCegarLoop]: Abstraction has 7078 states and 21512 transitions. [2021-07-09 18:50:30,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 21512 transitions. [2021-07-09 18:50:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:30,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:30,993 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:31,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-07-09 18:50:31,194 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1154540706, now seen corresponding path program 134 times [2021-07-09 18:50:31,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:31,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705436086] [2021-07-09 18:50:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:31,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:31,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705436086] [2021-07-09 18:50:31,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705436086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:31,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769462361] [2021-07-09 18:50:31,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:31,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:31,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:31,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:31,705 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 18:50:31,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:31,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:31,716 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 18:50:31,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:31,898 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 18:50:31,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:31,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:31,909 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 18:50:31,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:32,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769462361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:32,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:32,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156747072] [2021-07-09 18:50:32,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:32,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:32,350 INFO L87 Difference]: Start difference. First operand 7078 states and 21512 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:34,262 INFO L93 Difference]: Finished difference Result 9343 states and 28099 transitions. [2021-07-09 18:50:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:34,277 INFO L225 Difference]: With dead ends: 9343 [2021-07-09 18:50:34,277 INFO L226 Difference]: Without dead ends: 9286 [2021-07-09 18:50:34,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1808.6ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:34,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2021-07-09 18:50:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 7074. [2021-07-09 18:50:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.039869927894811) internal successors, (21501), 7073 states have internal predecessors, (21501), 0 states have call successors, (0), 0 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 18:50:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 21501 transitions. [2021-07-09 18:50:34,382 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 21501 transitions. Word has length 48 [2021-07-09 18:50:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:34,382 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 21501 transitions. [2021-07-09 18:50:34,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 21501 transitions. [2021-07-09 18:50:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:34,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:34,391 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:34,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:34,591 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:34,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1857279130, now seen corresponding path program 135 times [2021-07-09 18:50:34,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:34,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121749004] [2021-07-09 18:50:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:35,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:35,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121749004] [2021-07-09 18:50:35,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121749004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:35,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893225006] [2021-07-09 18:50:35,025 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:35,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:50:35,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:35,151 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 18:50:35,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:35,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:35,162 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 18:50:35,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:35,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:35,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:35,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:50:35,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:50:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:35,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893225006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:35,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:35,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:35,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52260073] [2021-07-09 18:50:35,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:35,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:35,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:35,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:35,838 INFO L87 Difference]: Start difference. First operand 7074 states and 21501 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:37,693 INFO L93 Difference]: Finished difference Result 9352 states and 28119 transitions. [2021-07-09 18:50:37,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:37,708 INFO L225 Difference]: With dead ends: 9352 [2021-07-09 18:50:37,708 INFO L226 Difference]: Without dead ends: 9266 [2021-07-09 18:50:37,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1922.7ms TimeCoverageRelationStatistics Valid=246, Invalid=3414, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2021-07-09 18:50:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 7054. [2021-07-09 18:50:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7054 states, 7053 states have (on average 3.0429604423649512) internal successors, (21462), 7053 states have internal predecessors, (21462), 0 states have call successors, (0), 0 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 18:50:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7054 states to 7054 states and 21462 transitions. [2021-07-09 18:50:37,813 INFO L78 Accepts]: Start accepts. Automaton has 7054 states and 21462 transitions. Word has length 48 [2021-07-09 18:50:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:37,814 INFO L482 AbstractCegarLoop]: Abstraction has 7054 states and 21462 transitions. [2021-07-09 18:50:37,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7054 states and 21462 transitions. [2021-07-09 18:50:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:37,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:37,822 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:38,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-09 18:50:38,022 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1115156770, now seen corresponding path program 136 times [2021-07-09 18:50:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:38,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684605199] [2021-07-09 18:50:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:38,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:38,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684605199] [2021-07-09 18:50:38,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684605199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:38,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019010731] [2021-07-09 18:50:38,405 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:38,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:38,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:38,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:38,529 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 18:50:38,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:38,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:38,541 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 18:50:38,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:38,720 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 18:50:38,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:38,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:38,731 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 18:50:38,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:39,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019010731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:39,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:39,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:39,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692050970] [2021-07-09 18:50:39,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:39,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:39,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:39,177 INFO L87 Difference]: Start difference. First operand 7054 states and 21462 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:40,824 INFO L93 Difference]: Finished difference Result 9384 states and 28204 transitions. [2021-07-09 18:50:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:40,840 INFO L225 Difference]: With dead ends: 9384 [2021-07-09 18:50:40,840 INFO L226 Difference]: Without dead ends: 9249 [2021-07-09 18:50:40,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1800.7ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:50:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-07-09 18:50:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 7050. [2021-07-09 18:50:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7050 states, 7049 states have (on average 3.043552276918712) internal successors, (21454), 7049 states have internal predecessors, (21454), 0 states have call successors, (0), 0 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 18:50:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7050 states to 7050 states and 21454 transitions. [2021-07-09 18:50:40,955 INFO L78 Accepts]: Start accepts. Automaton has 7050 states and 21454 transitions. Word has length 48 [2021-07-09 18:50:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:40,955 INFO L482 AbstractCegarLoop]: Abstraction has 7050 states and 21454 transitions. [2021-07-09 18:50:40,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:40,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7050 states and 21454 transitions. [2021-07-09 18:50:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:40,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:40,964 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:41,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:41,164 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:41,164 INFO L82 PathProgramCache]: Analyzing trace with hash -612048606, now seen corresponding path program 137 times [2021-07-09 18:50:41,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:41,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489244263] [2021-07-09 18:50:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:41,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489244263] [2021-07-09 18:50:41,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489244263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272436562] [2021-07-09 18:50:41,565 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:41,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:50:41,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:50:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:41,681 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 18:50:41,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:41,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:41,692 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 18:50:41,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:41,867 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 18:50:41,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:41,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:41,878 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 18:50:41,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:42,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272436562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:42,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:42,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:42,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711151502] [2021-07-09 18:50:42,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:42,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:42,272 INFO L87 Difference]: Start difference. First operand 7050 states and 21454 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:44,061 INFO L93 Difference]: Finished difference Result 9458 states and 28392 transitions. [2021-07-09 18:50:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:50:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:44,076 INFO L225 Difference]: With dead ends: 9458 [2021-07-09 18:50:44,076 INFO L226 Difference]: Without dead ends: 9340 [2021-07-09 18:50:44,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1785.6ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:50:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9340 states. [2021-07-09 18:50:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9340 to 7128. [2021-07-09 18:50:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 7127 states have (on average 3.0360600533183666) internal successors, (21638), 7127 states have internal predecessors, (21638), 0 states have call successors, (0), 0 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 18:50:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 21638 transitions. [2021-07-09 18:50:44,187 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 21638 transitions. Word has length 48 [2021-07-09 18:50:44,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:44,187 INFO L482 AbstractCegarLoop]: Abstraction has 7128 states and 21638 transitions. [2021-07-09 18:50:44,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:50:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 21638 transitions. [2021-07-09 18:50:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:44,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:44,196 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:44,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-07-09 18:50:44,396 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1993485524, now seen corresponding path program 138 times [2021-07-09 18:50:44,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:44,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634221118] [2021-07-09 18:50:44,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:44,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634221118] [2021-07-09 18:50:44,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634221118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898156432] [2021-07-09 18:50:44,788 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:44,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:50:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:50:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:44,938 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 18:50:44,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:44,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:44,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:50:44,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:45,132 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 18:50:45,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:45,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:45,143 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 18:50:45,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898156432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919222357] [2021-07-09 18:50:45,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:45,595 INFO L87 Difference]: Start difference. First operand 7128 states and 21638 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:47,725 INFO L93 Difference]: Finished difference Result 8136 states and 24601 transitions. [2021-07-09 18:50:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:50:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:47,737 INFO L225 Difference]: With dead ends: 8136 [2021-07-09 18:50:47,738 INFO L226 Difference]: Without dead ends: 8096 [2021-07-09 18:50:47,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 2090.7ms TimeCoverageRelationStatistics Valid=278, Invalid=3628, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:50:47,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8096 states. [2021-07-09 18:50:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8096 to 7146. [2021-07-09 18:50:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7146 states, 7145 states have (on average 3.0347095871238627) internal successors, (21683), 7145 states have internal predecessors, (21683), 0 states have call successors, (0), 0 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 18:50:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 21683 transitions. [2021-07-09 18:50:47,829 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 21683 transitions. Word has length 48 [2021-07-09 18:50:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:47,830 INFO L482 AbstractCegarLoop]: Abstraction has 7146 states and 21683 transitions. [2021-07-09 18:50:47,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 21683 transitions. [2021-07-09 18:50:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:47,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:47,838 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:48,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:48,038 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2072722928, now seen corresponding path program 139 times [2021-07-09 18:50:48,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:48,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136769611] [2021-07-09 18:50:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:48,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:48,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136769611] [2021-07-09 18:50:48,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136769611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:48,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382487364] [2021-07-09 18:50:48,441 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:48,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:48,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:48,586 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 18:50:48,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:48,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:48,598 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 18:50:48,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:48,781 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 18:50:48,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:48,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:48,793 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 18:50:48,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:49,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382487364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:49,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:49,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:49,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009529986] [2021-07-09 18:50:49,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:49,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:49,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:49,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:49,262 INFO L87 Difference]: Start difference. First operand 7146 states and 21683 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:50,928 INFO L93 Difference]: Finished difference Result 9323 states and 28022 transitions. [2021-07-09 18:50:50,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:50,928 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:50,943 INFO L225 Difference]: With dead ends: 9323 [2021-07-09 18:50:50,943 INFO L226 Difference]: Without dead ends: 9278 [2021-07-09 18:50:50,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1861.7ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9278 states. [2021-07-09 18:50:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9278 to 7140. [2021-07-09 18:50:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.034598683288976) internal successors, (21664), 7139 states have internal predecessors, (21664), 0 states have call successors, (0), 0 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 18:50:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21664 transitions. [2021-07-09 18:50:51,059 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21664 transitions. Word has length 48 [2021-07-09 18:50:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:51,059 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21664 transitions. [2021-07-09 18:50:51,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21664 transitions. [2021-07-09 18:50:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:51,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:51,067 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:51,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-09 18:50:51,268 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1125991128, now seen corresponding path program 140 times [2021-07-09 18:50:51,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:51,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940901206] [2021-07-09 18:50:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:51,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:51,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940901206] [2021-07-09 18:50:51,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940901206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:51,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298351181] [2021-07-09 18:50:51,657 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:51,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:50:51,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:51,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:51,773 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 18:50:51,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:51,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:51,784 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 18:50:51,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:51,969 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 18:50:51,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:51,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:51,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:50:51,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:52,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298351181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:52,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:52,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:50:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257769709] [2021-07-09 18:50:52,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:50:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:50:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:50:52,431 INFO L87 Difference]: Start difference. First operand 7140 states and 21664 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:54,266 INFO L93 Difference]: Finished difference Result 9405 states and 28251 transitions. [2021-07-09 18:50:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:50:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:50:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:54,280 INFO L225 Difference]: With dead ends: 9405 [2021-07-09 18:50:54,280 INFO L226 Difference]: Without dead ends: 9346 [2021-07-09 18:50:54,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1807.2ms TimeCoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:50:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2021-07-09 18:50:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 7134. [2021-07-09 18:50:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.034908173279125) internal successors, (21648), 7133 states have internal predecessors, (21648), 0 states have call successors, (0), 0 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 18:50:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21648 transitions. [2021-07-09 18:50:54,386 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21648 transitions. Word has length 48 [2021-07-09 18:50:54,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:54,386 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21648 transitions. [2021-07-09 18:50:54,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:50:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21648 transitions. [2021-07-09 18:50:54,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:54,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:54,395 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:54,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:54,595 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 971553610, now seen corresponding path program 141 times [2021-07-09 18:50:54,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:54,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833608524] [2021-07-09 18:50:54,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:55,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833608524] [2021-07-09 18:50:55,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833608524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:55,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546987070] [2021-07-09 18:50:55,021 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:55,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:50:55,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:50:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:55,139 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 18:50:55,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:55,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:55,151 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 18:50:55,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:55,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:50:55,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:55,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:55,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:50:55,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:50:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:55,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546987070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:55,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:55,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-07-09 18:50:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801695429] [2021-07-09 18:50:55,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:50:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:55,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:50:55,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1680, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:50:55,872 INFO L87 Difference]: Start difference. First operand 7134 states and 21648 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:50:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:50:57,980 INFO L93 Difference]: Finished difference Result 9412 states and 28266 transitions. [2021-07-09 18:50:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:50:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:50:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:50:57,995 INFO L225 Difference]: With dead ends: 9412 [2021-07-09 18:50:57,995 INFO L226 Difference]: Without dead ends: 9280 [2021-07-09 18:50:57,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 2030.0ms TimeCoverageRelationStatistics Valid=290, Invalid=3870, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:50:58,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-07-09 18:50:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 7068. [2021-07-09 18:50:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7068 states, 7067 states have (on average 3.0400452808829774) internal successors, (21484), 7067 states have internal predecessors, (21484), 0 states have call successors, (0), 0 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 18:50:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7068 states to 7068 states and 21484 transitions. [2021-07-09 18:50:58,098 INFO L78 Accepts]: Start accepts. Automaton has 7068 states and 21484 transitions. Word has length 48 [2021-07-09 18:50:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:50:58,098 INFO L482 AbstractCegarLoop]: Abstraction has 7068 states and 21484 transitions. [2021-07-09 18:50:58,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:50:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 7068 states and 21484 transitions. [2021-07-09 18:50:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:50:58,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:50:58,106 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:50:58,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:58,306 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:50:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:50:58,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1902951104, now seen corresponding path program 142 times [2021-07-09 18:50:58,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:50:58,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452653881] [2021-07-09 18:50:58,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:50:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:50:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:58,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:50:58,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452653881] [2021-07-09 18:50:58,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452653881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:58,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288317996] [2021-07-09 18:50:58,687 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:50:58,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:50:58,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:50:58,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:50:58,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:50:58,800 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 18:50:58,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:58,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:58,811 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 18:50:58,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:50:59,016 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 18:50:59,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:59,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:59,027 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 18:50:59,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:50:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:59,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288317996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:59,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:59,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:50:59,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690788244] [2021-07-09 18:50:59,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:50:59,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:59,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:50:59,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:50:59,413 INFO L87 Difference]: Start difference. First operand 7068 states and 21484 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:01,137 INFO L93 Difference]: Finished difference Result 9398 states and 28226 transitions. [2021-07-09 18:51:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:01,151 INFO L225 Difference]: With dead ends: 9398 [2021-07-09 18:51:01,151 INFO L226 Difference]: Without dead ends: 9240 [2021-07-09 18:51:01,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1750.3ms TimeCoverageRelationStatistics Valid=245, Invalid=3295, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:51:01,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9240 states. [2021-07-09 18:51:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9240 to 7038. [2021-07-09 18:51:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7038 states, 7037 states have (on average 3.044905499502629) internal successors, (21427), 7037 states have internal predecessors, (21427), 0 states have call successors, (0), 0 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 18:51:01,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7038 states to 7038 states and 21427 transitions. [2021-07-09 18:51:01,255 INFO L78 Accepts]: Start accepts. Automaton has 7038 states and 21427 transitions. Word has length 48 [2021-07-09 18:51:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:01,255 INFO L482 AbstractCegarLoop]: Abstraction has 7038 states and 21427 transitions. [2021-07-09 18:51:01,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 7038 states and 21427 transitions. [2021-07-09 18:51:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:01,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:01,263 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:01,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:01,464 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash -636517494, now seen corresponding path program 143 times [2021-07-09 18:51:01,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:01,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411031481] [2021-07-09 18:51:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:01,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:01,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411031481] [2021-07-09 18:51:01,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411031481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:01,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402853480] [2021-07-09 18:51:01,831 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:01,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:51:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:01,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:51:01,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:01,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:51:01,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:01,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:01,953 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 18:51:01,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:02,123 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 18:51:02,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:02,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:02,135 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 18:51:02,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:51:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:02,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402853480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:02,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:02,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-07-09 18:51:02,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733234642] [2021-07-09 18:51:02,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:51:02,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:02,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:51:02,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:51:02,468 INFO L87 Difference]: Start difference. First operand 7038 states and 21427 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 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 18:51:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:04,053 INFO L93 Difference]: Finished difference Result 9359 states and 28117 transitions. [2021-07-09 18:51:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 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 48 [2021-07-09 18:51:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:04,068 INFO L225 Difference]: With dead ends: 9359 [2021-07-09 18:51:04,068 INFO L226 Difference]: Without dead ends: 9215 [2021-07-09 18:51:04,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1587.2ms TimeCoverageRelationStatistics Valid=224, Invalid=2856, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:51:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9215 states. [2021-07-09 18:51:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9215 to 7101. [2021-07-09 18:51:04,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7101 states, 7100 states have (on average 3.04) internal successors, (21584), 7100 states have internal predecessors, (21584), 0 states have call successors, (0), 0 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 18:51:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7101 states to 7101 states and 21584 transitions. [2021-07-09 18:51:04,173 INFO L78 Accepts]: Start accepts. Automaton has 7101 states and 21584 transitions. Word has length 48 [2021-07-09 18:51:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:04,173 INFO L482 AbstractCegarLoop]: Abstraction has 7101 states and 21584 transitions. [2021-07-09 18:51:04,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 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 18:51:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7101 states and 21584 transitions. [2021-07-09 18:51:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:04,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:04,181 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:04,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-09 18:51:04,381 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash -529067126, now seen corresponding path program 144 times [2021-07-09 18:51:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:04,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897706959] [2021-07-09 18:51:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:04,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:04,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897706959] [2021-07-09 18:51:04,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897706959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:04,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170451927] [2021-07-09 18:51:04,756 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:04,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:51:04,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:51:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:04,895 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 18:51:04,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:04,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:04,906 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 18:51:04,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:05,089 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 18:51:05,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:05,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:05,101 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 18:51:05,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:51:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170451927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:05,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:05,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670357379] [2021-07-09 18:51:05,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:05,508 INFO L87 Difference]: Start difference. First operand 7101 states and 21584 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:07,535 INFO L93 Difference]: Finished difference Result 8063 states and 24420 transitions. [2021-07-09 18:51:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:51:07,536 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:07,548 INFO L225 Difference]: With dead ends: 8063 [2021-07-09 18:51:07,548 INFO L226 Difference]: Without dead ends: 8023 [2021-07-09 18:51:07,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1953.2ms TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:51:07,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2021-07-09 18:51:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 7113. [2021-07-09 18:51:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7113 states, 7112 states have (on average 3.0389482564679415) internal successors, (21613), 7112 states have internal predecessors, (21613), 0 states have call successors, (0), 0 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 18:51:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7113 states to 7113 states and 21613 transitions. [2021-07-09 18:51:07,639 INFO L78 Accepts]: Start accepts. Automaton has 7113 states and 21613 transitions. Word has length 48 [2021-07-09 18:51:07,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:07,639 INFO L482 AbstractCegarLoop]: Abstraction has 7113 states and 21613 transitions. [2021-07-09 18:51:07,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7113 states and 21613 transitions. [2021-07-09 18:51:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:07,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:07,647 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:07,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-09 18:51:07,848 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1405249590, now seen corresponding path program 145 times [2021-07-09 18:51:07,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:07,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906331533] [2021-07-09 18:51:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:08,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:08,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906331533] [2021-07-09 18:51:08,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906331533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:08,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4611476] [2021-07-09 18:51:08,225 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:08,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:08,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:08,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:08,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:08,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:08,348 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 18:51:08,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:08,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:08,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:08,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:08,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4611476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:08,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:08,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:08,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101213684] [2021-07-09 18:51:08,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:08,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:08,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:08,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:08,956 INFO L87 Difference]: Start difference. First operand 7113 states and 21613 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:10,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:10,491 INFO L93 Difference]: Finished difference Result 9196 states and 27677 transitions. [2021-07-09 18:51:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:10,491 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:10,505 INFO L225 Difference]: With dead ends: 9196 [2021-07-09 18:51:10,505 INFO L226 Difference]: Without dead ends: 9157 [2021-07-09 18:51:10,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1718.6ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:51:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9157 states. [2021-07-09 18:51:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9157 to 7109. [2021-07-09 18:51:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.039110861001688) internal successors, (21602), 7108 states have internal predecessors, (21602), 0 states have call successors, (0), 0 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 18:51:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21602 transitions. [2021-07-09 18:51:10,635 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21602 transitions. Word has length 48 [2021-07-09 18:51:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:10,635 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21602 transitions. [2021-07-09 18:51:10,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21602 transitions. [2021-07-09 18:51:10,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:10,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:10,643 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:10,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-09 18:51:10,844 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:10,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1263534450, now seen corresponding path program 146 times [2021-07-09 18:51:10,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:10,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422756430] [2021-07-09 18:51:10,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:11,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422756430] [2021-07-09 18:51:11,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422756430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:11,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287030531] [2021-07-09 18:51:11,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:11,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:51:11,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:11,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:11,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:11,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:11,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:11,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:11,343 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 18:51:11,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:11,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:11,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:11,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:11,529 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 18:51:11,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:11,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287030531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:11,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:11,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:11,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722496374] [2021-07-09 18:51:11,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:11,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:11,908 INFO L87 Difference]: Start difference. First operand 7109 states and 21602 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:13,773 INFO L93 Difference]: Finished difference Result 9338 states and 28028 transitions. [2021-07-09 18:51:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:13,787 INFO L225 Difference]: With dead ends: 9338 [2021-07-09 18:51:13,788 INFO L226 Difference]: Without dead ends: 9281 [2021-07-09 18:51:13,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1666.7ms TimeCoverageRelationStatistics Valid=229, Invalid=3077, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:51:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9281 states. [2021-07-09 18:51:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9281 to 7115. [2021-07-09 18:51:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 3.0383750351419736) internal successors, (21615), 7114 states have internal predecessors, (21615), 0 states have call successors, (0), 0 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 18:51:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 21615 transitions. [2021-07-09 18:51:13,893 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 21615 transitions. Word has length 48 [2021-07-09 18:51:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:13,893 INFO L482 AbstractCegarLoop]: Abstraction has 7115 states and 21615 transitions. [2021-07-09 18:51:13,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 21615 transitions. [2021-07-09 18:51:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:13,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:13,901 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:14,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 18:51:14,102 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:14,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1748285386, now seen corresponding path program 147 times [2021-07-09 18:51:14,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:14,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789669068] [2021-07-09 18:51:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:14,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:14,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789669068] [2021-07-09 18:51:14,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789669068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:14,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455612083] [2021-07-09 18:51:14,479 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:14,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:51:14,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:51:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:14,594 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 18:51:14,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:14,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:14,605 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 18:51:14,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:14,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:14,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:14,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:14,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:14,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:15,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455612083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:15,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:15,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-07-09 18:51:15,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753864027] [2021-07-09 18:51:15,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:51:15,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:15,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:51:15,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1521, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:51:15,299 INFO L87 Difference]: Start difference. First operand 7115 states and 21615 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:51:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:17,449 INFO L93 Difference]: Finished difference Result 9293 states and 27932 transitions. [2021-07-09 18:51:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:51:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:51:17,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:17,464 INFO L225 Difference]: With dead ends: 9293 [2021-07-09 18:51:17,464 INFO L226 Difference]: Without dead ends: 9199 [2021-07-09 18:51:17,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1909.5ms TimeCoverageRelationStatistics Valid=276, Invalid=3506, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:51:17,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-07-09 18:51:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 7095. [2021-07-09 18:51:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7095 states, 7094 states have (on average 3.0408796165773895) internal successors, (21572), 7094 states have internal predecessors, (21572), 0 states have call successors, (0), 0 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 18:51:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7095 states to 7095 states and 21572 transitions. [2021-07-09 18:51:17,568 INFO L78 Accepts]: Start accepts. Automaton has 7095 states and 21572 transitions. Word has length 48 [2021-07-09 18:51:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:17,568 INFO L482 AbstractCegarLoop]: Abstraction has 7095 states and 21572 transitions. [2021-07-09 18:51:17,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:51:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7095 states and 21572 transitions. [2021-07-09 18:51:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:17,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:17,576 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:17,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:17,785 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -884075100, now seen corresponding path program 148 times [2021-07-09 18:51:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:17,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920172211] [2021-07-09 18:51:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:18,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:18,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920172211] [2021-07-09 18:51:18,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920172211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:18,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172676513] [2021-07-09 18:51:18,152 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:18,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:51:18,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:18,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:18,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:18,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:18,276 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 18:51:18,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:18,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:18,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:18,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:18,484 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 18:51:18,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:18,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172676513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:18,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:18,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2021-07-09 18:51:18,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288948903] [2021-07-09 18:51:18,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:51:18,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:18,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:51:18,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1230, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:51:18,850 INFO L87 Difference]: Start difference. First operand 7095 states and 21572 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 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 18:51:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:20,624 INFO L93 Difference]: Finished difference Result 9427 states and 28261 transitions. [2021-07-09 18:51:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 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 48 [2021-07-09 18:51:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:20,639 INFO L225 Difference]: With dead ends: 9427 [2021-07-09 18:51:20,639 INFO L226 Difference]: Without dead ends: 9283 [2021-07-09 18:51:20,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1640.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2856, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:51:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9283 states. [2021-07-09 18:51:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9283 to 7155. [2021-07-09 18:51:20,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7155 states, 7154 states have (on average 3.034386357282639) internal successors, (21708), 7154 states have internal predecessors, (21708), 0 states have call successors, (0), 0 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 18:51:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7155 states to 7155 states and 21708 transitions. [2021-07-09 18:51:20,763 INFO L78 Accepts]: Start accepts. Automaton has 7155 states and 21708 transitions. Word has length 48 [2021-07-09 18:51:20,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:20,763 INFO L482 AbstractCegarLoop]: Abstraction has 7155 states and 21708 transitions. [2021-07-09 18:51:20,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 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 18:51:20,763 INFO L276 IsEmpty]: Start isEmpty. Operand 7155 states and 21708 transitions. [2021-07-09 18:51:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:20,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:20,772 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:20,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-09 18:51:20,972 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -858006224, now seen corresponding path program 149 times [2021-07-09 18:51:20,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:20,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996789864] [2021-07-09 18:51:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:21,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996789864] [2021-07-09 18:51:21,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996789864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436091564] [2021-07-09 18:51:21,353 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:21,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:51:21,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:51:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:21,467 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 18:51:21,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:21,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:21,478 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 18:51:21,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:21,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:21,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:21,664 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 18:51:21,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:22,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436091564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:22,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:22,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:22,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129708049] [2021-07-09 18:51:22,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:22,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:22,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:22,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:22,066 INFO L87 Difference]: Start difference. First operand 7155 states and 21708 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:24,144 INFO L93 Difference]: Finished difference Result 8127 states and 24567 transitions. [2021-07-09 18:51:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:51:24,145 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:24,157 INFO L225 Difference]: With dead ends: 8127 [2021-07-09 18:51:24,158 INFO L226 Difference]: Without dead ends: 8087 [2021-07-09 18:51:24,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1989.9ms TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:51:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8087 states. [2021-07-09 18:51:24,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8087 to 7173. [2021-07-09 18:51:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.0330451756832124) internal successors, (21753), 7172 states have internal predecessors, (21753), 0 states have call successors, (0), 0 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 18:51:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21753 transitions. [2021-07-09 18:51:24,252 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21753 transitions. Word has length 48 [2021-07-09 18:51:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:24,252 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21753 transitions. [2021-07-09 18:51:24,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21753 transitions. [2021-07-09 18:51:24,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:24,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:24,261 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:24,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:24,461 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:24,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1086765068, now seen corresponding path program 150 times [2021-07-09 18:51:24,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:24,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880353043] [2021-07-09 18:51:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:24,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880353043] [2021-07-09 18:51:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880353043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:24,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577069368] [2021-07-09 18:51:24,878 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:24,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:51:24,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:24,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:24,993 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 18:51:24,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:25,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:25,005 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 18:51:25,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:25,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:25,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:25,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:25,196 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 18:51:25,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:25,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577069368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:25,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:25,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:25,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143280539] [2021-07-09 18:51:25,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:25,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:25,589 INFO L87 Difference]: Start difference. First operand 7173 states and 21753 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:27,416 INFO L93 Difference]: Finished difference Result 9242 states and 27777 transitions. [2021-07-09 18:51:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:27,431 INFO L225 Difference]: With dead ends: 9242 [2021-07-09 18:51:27,432 INFO L226 Difference]: Without dead ends: 9197 [2021-07-09 18:51:27,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1783.5ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:51:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9197 states. [2021-07-09 18:51:27,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9197 to 7167. [2021-07-09 18:51:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7167 states, 7166 states have (on average 3.0329332961205693) internal successors, (21734), 7166 states have internal predecessors, (21734), 0 states have call successors, (0), 0 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 18:51:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7167 states to 7167 states and 21734 transitions. [2021-07-09 18:51:27,540 INFO L78 Accepts]: Start accepts. Automaton has 7167 states and 21734 transitions. Word has length 48 [2021-07-09 18:51:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:27,540 INFO L482 AbstractCegarLoop]: Abstraction has 7167 states and 21734 transitions. [2021-07-09 18:51:27,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7167 states and 21734 transitions. [2021-07-09 18:51:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:27,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:27,548 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:27,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 18:51:27,749 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:27,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2033496868, now seen corresponding path program 151 times [2021-07-09 18:51:27,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:27,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675610402] [2021-07-09 18:51:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:28,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675610402] [2021-07-09 18:51:28,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675610402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:28,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218719342] [2021-07-09 18:51:28,139 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:28,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:28,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:28,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:28,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:28,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:28,262 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 18:51:28,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:28,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:28,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:28,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:28,464 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 18:51:28,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218719342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:28,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:28,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:28,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962705770] [2021-07-09 18:51:28,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:28,892 INFO L87 Difference]: Start difference. First operand 7167 states and 21734 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:30,909 INFO L93 Difference]: Finished difference Result 9420 states and 28209 transitions. [2021-07-09 18:51:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:30,923 INFO L225 Difference]: With dead ends: 9420 [2021-07-09 18:51:30,923 INFO L226 Difference]: Without dead ends: 9361 [2021-07-09 18:51:30,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1735.0ms TimeCoverageRelationStatistics Valid=229, Invalid=3077, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:51:30,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2021-07-09 18:51:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 7173. [2021-07-09 18:51:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 3.0322085889570554) internal successors, (21747), 7172 states have internal predecessors, (21747), 0 states have call successors, (0), 0 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 18:51:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 21747 transitions. [2021-07-09 18:51:31,027 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 21747 transitions. Word has length 48 [2021-07-09 18:51:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:31,027 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 21747 transitions. [2021-07-09 18:51:31,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 21747 transitions. [2021-07-09 18:51:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:31,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:31,036 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:31,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:31,236 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2107032910, now seen corresponding path program 152 times [2021-07-09 18:51:31,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:31,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843384625] [2021-07-09 18:51:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:31,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:31,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843384625] [2021-07-09 18:51:31,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843384625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:31,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127968505] [2021-07-09 18:51:31,615 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:31,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:51:31,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:31,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:31,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:31,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:31,737 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 18:51:31,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:31,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:31,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:31,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:31,918 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 18:51:31,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:32,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127968505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:32,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:32,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:32,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053386513] [2021-07-09 18:51:32,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:32,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:32,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:32,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:32,299 INFO L87 Difference]: Start difference. First operand 7173 states and 21747 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:34,002 INFO L93 Difference]: Finished difference Result 9367 states and 28096 transitions. [2021-07-09 18:51:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:51:34,003 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:34,017 INFO L225 Difference]: With dead ends: 9367 [2021-07-09 18:51:34,017 INFO L226 Difference]: Without dead ends: 9211 [2021-07-09 18:51:34,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1648.8ms TimeCoverageRelationStatistics Valid=232, Invalid=3074, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:51:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2021-07-09 18:51:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 7107. [2021-07-09 18:51:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 3.0365887981987054) internal successors, (21578), 7106 states have internal predecessors, (21578), 0 states have call successors, (0), 0 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 18:51:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 21578 transitions. [2021-07-09 18:51:34,124 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 21578 transitions. Word has length 48 [2021-07-09 18:51:34,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:34,124 INFO L482 AbstractCegarLoop]: Abstraction has 7107 states and 21578 transitions. [2021-07-09 18:51:34,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:34,124 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 21578 transitions. [2021-07-09 18:51:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:34,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:34,132 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:34,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:34,333 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash 583645540, now seen corresponding path program 153 times [2021-07-09 18:51:34,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:34,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717627050] [2021-07-09 18:51:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:34,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717627050] [2021-07-09 18:51:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717627050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:34,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055032642] [2021-07-09 18:51:34,712 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:34,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:51:34,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:34,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:34,856 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 18:51:34,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:34,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:34,867 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 18:51:34,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:35,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:35,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:35,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:35,058 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 18:51:35,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:35,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055032642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:35,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:35,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:35,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974701982] [2021-07-09 18:51:35,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:35,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:35,463 INFO L87 Difference]: Start difference. First operand 7107 states and 21578 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:37,538 INFO L93 Difference]: Finished difference Result 8069 states and 24414 transitions. [2021-07-09 18:51:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:51:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:37,551 INFO L225 Difference]: With dead ends: 8069 [2021-07-09 18:51:37,551 INFO L226 Difference]: Without dead ends: 8029 [2021-07-09 18:51:37,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 2016.6ms TimeCoverageRelationStatistics Valid=279, Invalid=3261, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:51:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8029 states. [2021-07-09 18:51:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8029 to 7115. [2021-07-09 18:51:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 3.0358448130447004) internal successors, (21597), 7114 states have internal predecessors, (21597), 0 states have call successors, (0), 0 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 18:51:37,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 21597 transitions. [2021-07-09 18:51:37,641 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 21597 transitions. Word has length 48 [2021-07-09 18:51:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:37,641 INFO L482 AbstractCegarLoop]: Abstraction has 7115 states and 21597 transitions. [2021-07-09 18:51:37,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 21597 transitions. [2021-07-09 18:51:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:37,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:37,649 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:37,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-07-09 18:51:37,850 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -292536924, now seen corresponding path program 154 times [2021-07-09 18:51:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:37,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995991170] [2021-07-09 18:51:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:38,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995991170] [2021-07-09 18:51:38,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995991170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928863342] [2021-07-09 18:51:38,235 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:38,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:51:38,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:38,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:38,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:38,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:38,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:38,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:38,360 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 18:51:38,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:38,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:38,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:38,553 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 18:51:38,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:38,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928863342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:38,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:38,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:38,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232070601] [2021-07-09 18:51:38,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:38,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:38,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:38,986 INFO L87 Difference]: Start difference. First operand 7115 states and 21597 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:40,954 INFO L93 Difference]: Finished difference Result 8035 states and 24345 transitions. [2021-07-09 18:51:40,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:51:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:40,965 INFO L225 Difference]: With dead ends: 8035 [2021-07-09 18:51:40,965 INFO L226 Difference]: Without dead ends: 7996 [2021-07-09 18:51:40,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1942.6ms TimeCoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:51:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7996 states. [2021-07-09 18:51:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7996 to 7111. [2021-07-09 18:51:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.0364275668073137) internal successors, (21589), 7110 states have internal predecessors, (21589), 0 states have call successors, (0), 0 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 18:51:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21589 transitions. [2021-07-09 18:51:41,052 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21589 transitions. Word has length 48 [2021-07-09 18:51:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:41,052 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21589 transitions. [2021-07-09 18:51:41,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21589 transitions. [2021-07-09 18:51:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:41,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:41,061 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:41,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-07-09 18:51:41,261 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:41,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:41,261 INFO L82 PathProgramCache]: Analyzing trace with hash 951510436, now seen corresponding path program 155 times [2021-07-09 18:51:41,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:41,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973898447] [2021-07-09 18:51:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:41,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973898447] [2021-07-09 18:51:41,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973898447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209557931] [2021-07-09 18:51:41,646 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:41,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:51:41,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:51:41,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:41,764 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 18:51:41,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:41,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:41,775 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 18:51:41,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:41,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:41,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:41,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:41,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:42,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209557931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:42,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:42,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727946897] [2021-07-09 18:51:42,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:42,379 INFO L87 Difference]: Start difference. First operand 7111 states and 21589 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:44,376 INFO L93 Difference]: Finished difference Result 8075 states and 24426 transitions. [2021-07-09 18:51:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:51:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:44,389 INFO L225 Difference]: With dead ends: 8075 [2021-07-09 18:51:44,389 INFO L226 Difference]: Without dead ends: 8035 [2021-07-09 18:51:44,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 2033.1ms TimeCoverageRelationStatistics Valid=279, Invalid=3261, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:51:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2021-07-09 18:51:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 7117. [2021-07-09 18:51:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 7116 states have (on average 3.0356942102304667) internal successors, (21602), 7116 states have internal predecessors, (21602), 0 states have call successors, (0), 0 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 18:51:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 21602 transitions. [2021-07-09 18:51:44,479 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 21602 transitions. Word has length 48 [2021-07-09 18:51:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:44,479 INFO L482 AbstractCegarLoop]: Abstraction has 7117 states and 21602 transitions. [2021-07-09 18:51:44,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 21602 transitions. [2021-07-09 18:51:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:44,487 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:44,487 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:44,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-07-09 18:51:44,693 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1579786930, now seen corresponding path program 156 times [2021-07-09 18:51:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:44,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995888148] [2021-07-09 18:51:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:45,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:45,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995888148] [2021-07-09 18:51:45,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995888148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:45,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140092922] [2021-07-09 18:51:45,094 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:45,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:51:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:45,206 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 18:51:45,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:45,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:45,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:51:45,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:45,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:45,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:45,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:45,403 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 18:51:45,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140092922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:45,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:45,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:45,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526323076] [2021-07-09 18:51:45,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:45,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:45,798 INFO L87 Difference]: Start difference. First operand 7117 states and 21602 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:47,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:47,665 INFO L93 Difference]: Finished difference Result 8045 states and 24366 transitions. [2021-07-09 18:51:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:51:47,665 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:47,677 INFO L225 Difference]: With dead ends: 8045 [2021-07-09 18:51:47,677 INFO L226 Difference]: Without dead ends: 8000 [2021-07-09 18:51:47,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1858.2ms TimeCoverageRelationStatistics Valid=256, Invalid=3166, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:51:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8000 states. [2021-07-09 18:51:47,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8000 to 7111. [2021-07-09 18:51:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.0361462728551336) internal successors, (21587), 7110 states have internal predecessors, (21587), 0 states have call successors, (0), 0 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 18:51:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21587 transitions. [2021-07-09 18:51:47,771 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21587 transitions. Word has length 48 [2021-07-09 18:51:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:47,771 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21587 transitions. [2021-07-09 18:51:47,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21587 transitions. [2021-07-09 18:51:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:47,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:47,779 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:47,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 18:51:47,980 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1519490588, now seen corresponding path program 157 times [2021-07-09 18:51:47,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:47,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203219484] [2021-07-09 18:51:47,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:48,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:48,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203219484] [2021-07-09 18:51:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203219484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:48,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241483001] [2021-07-09 18:51:48,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:48,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:48,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:48,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:48,484 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 18:51:48,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:48,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:48,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:48,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:48,679 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 18:51:48,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:49,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241483001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:49,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:49,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:49,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654922983] [2021-07-09 18:51:49,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:49,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:49,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:49,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:49,091 INFO L87 Difference]: Start difference. First operand 7111 states and 21587 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:50,942 INFO L93 Difference]: Finished difference Result 9180 states and 27613 transitions. [2021-07-09 18:51:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:51:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:50,955 INFO L225 Difference]: With dead ends: 9180 [2021-07-09 18:51:50,955 INFO L226 Difference]: Without dead ends: 9145 [2021-07-09 18:51:50,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1721.3ms TimeCoverageRelationStatistics Valid=229, Invalid=3077, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:51:50,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2021-07-09 18:51:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 7115. [2021-07-09 18:51:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7115 states, 7114 states have (on average 3.0355636772561145) internal successors, (21595), 7114 states have internal predecessors, (21595), 0 states have call successors, (0), 0 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 18:51:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 21595 transitions. [2021-07-09 18:51:51,055 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 21595 transitions. Word has length 48 [2021-07-09 18:51:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:51,055 INFO L482 AbstractCegarLoop]: Abstraction has 7115 states and 21595 transitions. [2021-07-09 18:51:51,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 21595 transitions. [2021-07-09 18:51:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:51,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:51,063 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:51,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-07-09 18:51:51,264 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2126928348, now seen corresponding path program 158 times [2021-07-09 18:51:51,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:51,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589096937] [2021-07-09 18:51:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:51,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589096937] [2021-07-09 18:51:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589096937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561827969] [2021-07-09 18:51:51,637 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:51,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:51:51,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:51,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:51,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:51,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:51,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:51,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:51,764 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 18:51:51,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:51,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:51,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:51,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:51,960 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 18:51:51,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:52,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561827969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:52,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:52,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779457762] [2021-07-09 18:51:52,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:52,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:52,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:52,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:52,358 INFO L87 Difference]: Start difference. First operand 7115 states and 21595 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:54,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:54,060 INFO L93 Difference]: Finished difference Result 9184 states and 27619 transitions. [2021-07-09 18:51:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:51:54,061 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:54,075 INFO L225 Difference]: With dead ends: 9184 [2021-07-09 18:51:54,075 INFO L226 Difference]: Without dead ends: 9139 [2021-07-09 18:51:54,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1700.3ms TimeCoverageRelationStatistics Valid=229, Invalid=3077, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:51:54,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9139 states. [2021-07-09 18:51:54,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9139 to 7109. [2021-07-09 18:51:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.0362971299943724) internal successors, (21582), 7108 states have internal predecessors, (21582), 0 states have call successors, (0), 0 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 18:51:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21582 transitions. [2021-07-09 18:51:54,180 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21582 transitions. Word has length 48 [2021-07-09 18:51:54,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:54,180 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21582 transitions. [2021-07-09 18:51:54,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21582 transitions. [2021-07-09 18:51:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:54,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:54,188 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:54,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-07-09 18:51:54,388 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:54,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1589765576, now seen corresponding path program 159 times [2021-07-09 18:51:54,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:54,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974412582] [2021-07-09 18:51:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:54,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:54,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974412582] [2021-07-09 18:51:54,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974412582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:54,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010391456] [2021-07-09 18:51:54,766 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:54,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:51:54,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:54,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:54,909 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 18:51:54,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:54,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:54,920 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 18:51:54,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:51:55,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:55,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:55,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:55,110 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 18:51:55,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:55,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010391456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:55,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:55,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:55,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670914874] [2021-07-09 18:51:55,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:55,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:55,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:55,509 INFO L87 Difference]: Start difference. First operand 7109 states and 21582 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:57,407 INFO L93 Difference]: Finished difference Result 8080 states and 24438 transitions. [2021-07-09 18:51:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:51:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:51:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:57,420 INFO L225 Difference]: With dead ends: 8080 [2021-07-09 18:51:57,420 INFO L226 Difference]: Without dead ends: 8027 [2021-07-09 18:51:57,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1928.5ms TimeCoverageRelationStatistics Valid=274, Invalid=3386, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:51:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-07-09 18:51:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 7117. [2021-07-09 18:51:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 7116 states have (on average 3.0348510399100617) internal successors, (21596), 7116 states have internal predecessors, (21596), 0 states have call successors, (0), 0 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 18:51:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 21596 transitions. [2021-07-09 18:51:57,511 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 21596 transitions. Word has length 48 [2021-07-09 18:51:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:57,511 INFO L482 AbstractCegarLoop]: Abstraction has 7117 states and 21596 transitions. [2021-07-09 18:51:57,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:51:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 21596 transitions. [2021-07-09 18:51:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:51:57,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:57,519 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:51:57,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:57,720 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1829019256, now seen corresponding path program 160 times [2021-07-09 18:51:57,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:57,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506633513] [2021-07-09 18:51:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:58,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:58,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506633513] [2021-07-09 18:51:58,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506633513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:58,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915193426] [2021-07-09 18:51:58,095 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:58,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:51:58,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:51:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:58,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:58,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:58,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:58,218 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 18:51:58,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:51:58,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:51:58,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:51:58,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:51:58,405 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 18:51:58,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:51:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:58,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915193426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:58,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:58,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:51:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909342675] [2021-07-09 18:51:58,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:51:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:58,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:51:58,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:51:58,833 INFO L87 Difference]: Start difference. First operand 7117 states and 21596 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:00,561 INFO L93 Difference]: Finished difference Result 9182 states and 27612 transitions. [2021-07-09 18:52:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:00,561 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:00,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:00,576 INFO L225 Difference]: With dead ends: 9182 [2021-07-09 18:52:00,576 INFO L226 Difference]: Without dead ends: 9139 [2021-07-09 18:52:00,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1729.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9139 states. [2021-07-09 18:52:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9139 to 7109. [2021-07-09 18:52:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7109 states, 7108 states have (on average 3.036156443444007) internal successors, (21581), 7108 states have internal predecessors, (21581), 0 states have call successors, (0), 0 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 18:52:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7109 states to 7109 states and 21581 transitions. [2021-07-09 18:52:00,703 INFO L78 Accepts]: Start accepts. Automaton has 7109 states and 21581 transitions. Word has length 48 [2021-07-09 18:52:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:00,704 INFO L482 AbstractCegarLoop]: Abstraction has 7109 states and 21581 transitions. [2021-07-09 18:52:00,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7109 states and 21581 transitions. [2021-07-09 18:52:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:00,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:00,712 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:00,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-09 18:52:00,921 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash 549105320, now seen corresponding path program 161 times [2021-07-09 18:52:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:00,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90408742] [2021-07-09 18:52:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:01,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:01,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90408742] [2021-07-09 18:52:01,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90408742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:01,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653211631] [2021-07-09 18:52:01,298 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:01,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:52:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:01,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-09 18:52:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:01,413 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 18:52:01,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:01,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:01,424 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 18:52:01,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:01,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:01,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:01,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:01,614 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 18:52:01,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:02,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653211631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:02,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:02,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:02,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298238304] [2021-07-09 18:52:02,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:02,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:02,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:02,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:02,014 INFO L87 Difference]: Start difference. First operand 7109 states and 21581 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:04,027 INFO L93 Difference]: Finished difference Result 8088 states and 24455 transitions. [2021-07-09 18:52:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:52:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:04,041 INFO L225 Difference]: With dead ends: 8088 [2021-07-09 18:52:04,041 INFO L226 Difference]: Without dead ends: 8035 [2021-07-09 18:52:04,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2010.1ms TimeCoverageRelationStatistics Valid=274, Invalid=3386, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2021-07-09 18:52:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 7121. [2021-07-09 18:52:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 7120 states have (on average 3.034691011235955) internal successors, (21607), 7120 states have internal predecessors, (21607), 0 states have call successors, (0), 0 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 18:52:04,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 21607 transitions. [2021-07-09 18:52:04,136 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 21607 transitions. Word has length 48 [2021-07-09 18:52:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:04,136 INFO L482 AbstractCegarLoop]: Abstraction has 7121 states and 21607 transitions. [2021-07-09 18:52:04,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 21607 transitions. [2021-07-09 18:52:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:04,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:04,144 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:04,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:04,346 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:04,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:04,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1982192046, now seen corresponding path program 162 times [2021-07-09 18:52:04,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:04,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181284628] [2021-07-09 18:52:04,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:04,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:04,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181284628] [2021-07-09 18:52:04,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181284628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:04,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453070413] [2021-07-09 18:52:04,723 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:04,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:52:04,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:04,863 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 18:52:04,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:04,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:04,874 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 18:52:04,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:05,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:05,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:05,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:05,061 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 18:52:05,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:05,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453070413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:05,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:05,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:05,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239544563] [2021-07-09 18:52:05,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:05,454 INFO L87 Difference]: Start difference. First operand 7121 states and 21607 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:07,159 INFO L93 Difference]: Finished difference Result 9190 states and 27631 transitions. [2021-07-09 18:52:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:07,173 INFO L225 Difference]: With dead ends: 9190 [2021-07-09 18:52:07,173 INFO L226 Difference]: Without dead ends: 9137 [2021-07-09 18:52:07,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1720.1ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9137 states. [2021-07-09 18:52:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9137 to 7107. [2021-07-09 18:52:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7107 states, 7106 states have (on average 3.036307345904869) internal successors, (21576), 7106 states have internal predecessors, (21576), 0 states have call successors, (0), 0 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 18:52:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7107 states to 7107 states and 21576 transitions. [2021-07-09 18:52:07,277 INFO L78 Accepts]: Start accepts. Automaton has 7107 states and 21576 transitions. Word has length 48 [2021-07-09 18:52:07,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:07,277 INFO L482 AbstractCegarLoop]: Abstraction has 7107 states and 21576 transitions. [2021-07-09 18:52:07,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7107 states and 21576 transitions. [2021-07-09 18:52:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:07,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:07,286 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:07,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:07,486 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1767076998, now seen corresponding path program 163 times [2021-07-09 18:52:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:07,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666459219] [2021-07-09 18:52:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:07,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:07,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666459219] [2021-07-09 18:52:07,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666459219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:07,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434546987] [2021-07-09 18:52:07,874 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:07,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:07,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:07,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:08,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:08,008 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 18:52:08,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:52:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:08,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:08,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:08,195 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 18:52:08,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434546987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:08,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:08,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:08,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506710251] [2021-07-09 18:52:08,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:08,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:08,592 INFO L87 Difference]: Start difference. First operand 7107 states and 21576 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:10,566 INFO L93 Difference]: Finished difference Result 8061 states and 24390 transitions. [2021-07-09 18:52:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:52:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:10,579 INFO L225 Difference]: With dead ends: 8061 [2021-07-09 18:52:10,579 INFO L226 Difference]: Without dead ends: 8021 [2021-07-09 18:52:10,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1945.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3386, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8021 states. [2021-07-09 18:52:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8021 to 7111. [2021-07-09 18:52:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7110 states have (on average 3.0355836849507734) internal successors, (21583), 7110 states have internal predecessors, (21583), 0 states have call successors, (0), 0 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 18:52:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 21583 transitions. [2021-07-09 18:52:10,693 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 21583 transitions. Word has length 48 [2021-07-09 18:52:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:10,694 INFO L482 AbstractCegarLoop]: Abstraction has 7111 states and 21583 transitions. [2021-07-09 18:52:10,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 21583 transitions. [2021-07-09 18:52:10,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:10,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:10,702 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:10,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:10,902 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:10,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash 890894534, now seen corresponding path program 164 times [2021-07-09 18:52:10,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:10,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279970041] [2021-07-09 18:52:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:11,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:11,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279970041] [2021-07-09 18:52:11,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279970041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:11,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873110456] [2021-07-09 18:52:11,280 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:11,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:52:11,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:11,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:11,395 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 18:52:11,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:11,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:11,406 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 18:52:11,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:11,581 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 18:52:11,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:11,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:11,593 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 18:52:11,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:11,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873110456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:11,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:11,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:11,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011903590] [2021-07-09 18:52:11,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:11,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:11,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:11,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:11,986 INFO L87 Difference]: Start difference. First operand 7111 states and 21583 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:13,638 INFO L93 Difference]: Finished difference Result 9176 states and 27599 transitions. [2021-07-09 18:52:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:13,652 INFO L225 Difference]: With dead ends: 9176 [2021-07-09 18:52:13,652 INFO L226 Difference]: Without dead ends: 9129 [2021-07-09 18:52:13,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1697.6ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-07-09 18:52:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7099. [2021-07-09 18:52:13,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 3.0376162299239224) internal successors, (21561), 7098 states have internal predecessors, (21561), 0 states have call successors, (0), 0 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 18:52:13,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 21561 transitions. [2021-07-09 18:52:13,757 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 21561 transitions. Word has length 48 [2021-07-09 18:52:13,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:13,757 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 21561 transitions. [2021-07-09 18:52:13,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 21561 transitions. [2021-07-09 18:52:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:13,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:13,766 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:13,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:13,966 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:13,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:13,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1534563868, now seen corresponding path program 165 times [2021-07-09 18:52:13,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:13,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330266478] [2021-07-09 18:52:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:14,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:14,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330266478] [2021-07-09 18:52:14,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330266478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:14,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228090149] [2021-07-09 18:52:14,345 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:14,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:52:14,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:14,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:14,459 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 18:52:14,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:14,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:14,470 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 18:52:14,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:14,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:14,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:14,659 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 18:52:14,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:15,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228090149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:15,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:15,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:15,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607900207] [2021-07-09 18:52:15,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:15,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:15,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:15,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:15,082 INFO L87 Difference]: Start difference. First operand 7099 states and 21561 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:17,022 INFO L93 Difference]: Finished difference Result 8059 states and 24388 transitions. [2021-07-09 18:52:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:52:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:17,035 INFO L225 Difference]: With dead ends: 8059 [2021-07-09 18:52:17,035 INFO L226 Difference]: Without dead ends: 8019 [2021-07-09 18:52:17,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1983.5ms TimeCoverageRelationStatistics Valid=274, Invalid=3386, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8019 states. [2021-07-09 18:52:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8019 to 7105. [2021-07-09 18:52:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7105 states, 7104 states have (on average 3.036880630630631) internal successors, (21574), 7104 states have internal predecessors, (21574), 0 states have call successors, (0), 0 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 18:52:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 21574 transitions. [2021-07-09 18:52:17,126 INFO L78 Accepts]: Start accepts. Automaton has 7105 states and 21574 transitions. Word has length 48 [2021-07-09 18:52:17,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:17,126 INFO L482 AbstractCegarLoop]: Abstraction has 7105 states and 21574 transitions. [2021-07-09 18:52:17,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 7105 states and 21574 transitions. [2021-07-09 18:52:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:17,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:17,135 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:17,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-07-09 18:52:17,336 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash 229106062, now seen corresponding path program 166 times [2021-07-09 18:52:17,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:17,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878932205] [2021-07-09 18:52:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:17,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:17,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:17,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878932205] [2021-07-09 18:52:17,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878932205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:17,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329669737] [2021-07-09 18:52:17,712 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:17,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:52:17,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:17,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:17,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:17,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:17,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:17,839 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 18:52:17,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:52:18,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:18,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:18,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:18,026 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 18:52:18,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:18,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329669737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:18,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:18,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:18,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995273837] [2021-07-09 18:52:18,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:18,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:18,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:18,440 INFO L87 Difference]: Start difference. First operand 7105 states and 21574 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:20,027 INFO L93 Difference]: Finished difference Result 9174 states and 27598 transitions. [2021-07-09 18:52:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:20,028 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:20,043 INFO L225 Difference]: With dead ends: 9174 [2021-07-09 18:52:20,043 INFO L226 Difference]: Without dead ends: 9086 [2021-07-09 18:52:20,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1727.6ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9086 states. [2021-07-09 18:52:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9086 to 7056. [2021-07-09 18:52:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7056 states, 7055 states have (on average 3.043231750531538) internal successors, (21470), 7055 states have internal predecessors, (21470), 0 states have call successors, (0), 0 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 18:52:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7056 states to 7056 states and 21470 transitions. [2021-07-09 18:52:20,149 INFO L78 Accepts]: Start accepts. Automaton has 7056 states and 21470 transitions. Word has length 48 [2021-07-09 18:52:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:20,149 INFO L482 AbstractCegarLoop]: Abstraction has 7056 states and 21470 transitions. [2021-07-09 18:52:20,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7056 states and 21470 transitions. [2021-07-09 18:52:20,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:20,157 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:20,157 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:20,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 18:52:20,360 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:20,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:20,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1772153944, now seen corresponding path program 167 times [2021-07-09 18:52:20,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:20,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173399005] [2021-07-09 18:52:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:20,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173399005] [2021-07-09 18:52:20,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173399005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487713154] [2021-07-09 18:52:20,833 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:20,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:52:20,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:52:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:20,959 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 18:52:20,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:20,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:20,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:20,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:21,168 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 18:52:21,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:21,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:21,181 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 18:52:21,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:21,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487713154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:21,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:21,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:21,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031904843] [2021-07-09 18:52:21,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:21,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:21,598 INFO L87 Difference]: Start difference. First operand 7056 states and 21470 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:23,541 INFO L93 Difference]: Finished difference Result 9307 states and 27972 transitions. [2021-07-09 18:52:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:23,556 INFO L225 Difference]: With dead ends: 9307 [2021-07-09 18:52:23,556 INFO L226 Difference]: Without dead ends: 9189 [2021-07-09 18:52:23,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1894.1ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9189 states. [2021-07-09 18:52:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9189 to 7076. [2021-07-09 18:52:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7076 states, 7075 states have (on average 3.0401413427561836) internal successors, (21509), 7075 states have internal predecessors, (21509), 0 states have call successors, (0), 0 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 18:52:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7076 states to 7076 states and 21509 transitions. [2021-07-09 18:52:23,665 INFO L78 Accepts]: Start accepts. Automaton has 7076 states and 21509 transitions. Word has length 48 [2021-07-09 18:52:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:23,665 INFO L482 AbstractCegarLoop]: Abstraction has 7076 states and 21509 transitions. [2021-07-09 18:52:23,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 7076 states and 21509 transitions. [2021-07-09 18:52:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:23,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:23,674 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:23,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:23,889 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1664703576, now seen corresponding path program 168 times [2021-07-09 18:52:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:23,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60007803] [2021-07-09 18:52:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:24,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:24,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60007803] [2021-07-09 18:52:24,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60007803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:24,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866504495] [2021-07-09 18:52:24,336 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:24,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:52:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:52:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:24,467 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 18:52:24,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:24,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:24,481 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 18:52:24,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:24,674 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 18:52:24,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:24,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:24,686 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 18:52:24,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:25,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866504495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:25,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:25,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:25,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825515266] [2021-07-09 18:52:25,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:25,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:25,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:25,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:25,217 INFO L87 Difference]: Start difference. First operand 7076 states and 21509 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:27,541 INFO L93 Difference]: Finished difference Result 8034 states and 24333 transitions. [2021-07-09 18:52:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:52:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:27,553 INFO L225 Difference]: With dead ends: 8034 [2021-07-09 18:52:27,553 INFO L226 Difference]: Without dead ends: 7994 [2021-07-09 18:52:27,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 2274.3ms TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:52:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7994 states. [2021-07-09 18:52:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7994 to 7088. [2021-07-09 18:52:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 7087 states have (on average 3.0390856497812897) internal successors, (21538), 7087 states have internal predecessors, (21538), 0 states have call successors, (0), 0 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 18:52:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 21538 transitions. [2021-07-09 18:52:27,645 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 21538 transitions. Word has length 48 [2021-07-09 18:52:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:27,645 INFO L482 AbstractCegarLoop]: Abstraction has 7088 states and 21538 transitions. [2021-07-09 18:52:27,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 21538 transitions. [2021-07-09 18:52:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:27,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:27,653 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:27,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 18:52:27,854 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:27,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1754081256, now seen corresponding path program 169 times [2021-07-09 18:52:27,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:27,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462422696] [2021-07-09 18:52:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:28,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:28,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462422696] [2021-07-09 18:52:28,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462422696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:28,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112735724] [2021-07-09 18:52:28,265 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:28,384 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 18:52:28,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:28,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:28,395 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 18:52:28,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:28,579 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 18:52:28,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:28,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:28,591 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 18:52:28,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:29,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112735724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:29,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:29,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:29,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40733565] [2021-07-09 18:52:29,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:29,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:29,040 INFO L87 Difference]: Start difference. First operand 7088 states and 21538 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:30,842 INFO L93 Difference]: Finished difference Result 9162 states and 27574 transitions. [2021-07-09 18:52:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:30,856 INFO L225 Difference]: With dead ends: 9162 [2021-07-09 18:52:30,856 INFO L226 Difference]: Without dead ends: 9123 [2021-07-09 18:52:30,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1832.4ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9123 states. [2021-07-09 18:52:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9123 to 7084. [2021-07-09 18:52:30,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7083 states have (on average 3.0392489058308625) internal successors, (21527), 7083 states have internal predecessors, (21527), 0 states have call successors, (0), 0 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 18:52:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 21527 transitions. [2021-07-09 18:52:30,961 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 21527 transitions. Word has length 48 [2021-07-09 18:52:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:30,961 INFO L482 AbstractCegarLoop]: Abstraction has 7084 states and 21527 transitions. [2021-07-09 18:52:30,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 21527 transitions. [2021-07-09 18:52:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:30,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:30,969 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:31,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:31,173 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1895796396, now seen corresponding path program 170 times [2021-07-09 18:52:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041398467] [2021-07-09 18:52:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:31,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041398467] [2021-07-09 18:52:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041398467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976691580] [2021-07-09 18:52:31,597 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:31,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:52:31,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:31,721 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 18:52:31,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:31,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:31,732 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 18:52:31,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:31,913 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 18:52:31,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:31,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:31,924 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 18:52:31,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:32,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976691580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:32,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:32,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:32,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260078098] [2021-07-09 18:52:32,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:32,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:32,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:32,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:32,361 INFO L87 Difference]: Start difference. First operand 7084 states and 21527 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:34,067 INFO L93 Difference]: Finished difference Result 9250 states and 27819 transitions. [2021-07-09 18:52:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:34,067 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:34,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:34,081 INFO L225 Difference]: With dead ends: 9250 [2021-07-09 18:52:34,081 INFO L226 Difference]: Without dead ends: 9193 [2021-07-09 18:52:34,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1782.6ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-07-09 18:52:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 7080. [2021-07-09 18:52:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7080 states, 7079 states have (on average 3.039412346376607) internal successors, (21516), 7079 states have internal predecessors, (21516), 0 states have call successors, (0), 0 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 18:52:34,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7080 states to 7080 states and 21516 transitions. [2021-07-09 18:52:34,184 INFO L78 Accepts]: Start accepts. Automaton has 7080 states and 21516 transitions. Word has length 48 [2021-07-09 18:52:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:34,184 INFO L482 AbstractCegarLoop]: Abstraction has 7080 states and 21516 transitions. [2021-07-09 18:52:34,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7080 states and 21516 transitions. [2021-07-09 18:52:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:34,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:34,192 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:34,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-07-09 18:52:34,394 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 612648936, now seen corresponding path program 171 times [2021-07-09 18:52:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:34,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87968635] [2021-07-09 18:52:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:34,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87968635] [2021-07-09 18:52:34,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87968635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:34,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662412212] [2021-07-09 18:52:34,780 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:34,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:52:34,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:52:34,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:34,895 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 18:52:34,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:34,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:34,906 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 18:52:34,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:35,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:35,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:35,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:35,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:52:35,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:35,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662412212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:35,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:35,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-07-09 18:52:35,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431016990] [2021-07-09 18:52:35,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-07-09 18:52:35,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-07-09 18:52:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1682, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:52:35,651 INFO L87 Difference]: Start difference. First operand 7080 states and 21516 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:52:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:37,684 INFO L93 Difference]: Finished difference Result 9259 states and 27839 transitions. [2021-07-09 18:52:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:52:37,684 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 48 [2021-07-09 18:52:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:37,698 INFO L225 Difference]: With dead ends: 9259 [2021-07-09 18:52:37,698 INFO L226 Difference]: Without dead ends: 9173 [2021-07-09 18:52:37,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1986.1ms TimeCoverageRelationStatistics Valid=286, Invalid=3874, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:52:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9173 states. [2021-07-09 18:52:37,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9173 to 7060. [2021-07-09 18:52:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 3.042498937526562) internal successors, (21477), 7059 states have internal predecessors, (21477), 0 states have call successors, (0), 0 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 18:52:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 21477 transitions. [2021-07-09 18:52:37,802 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 21477 transitions. Word has length 48 [2021-07-09 18:52:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:37,802 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 21477 transitions. [2021-07-09 18:52:37,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 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 18:52:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 21477 transitions. [2021-07-09 18:52:37,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:37,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:37,810 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:38,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:38,010 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash -129473424, now seen corresponding path program 172 times [2021-07-09 18:52:38,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:38,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036232736] [2021-07-09 18:52:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:38,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:38,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036232736] [2021-07-09 18:52:38,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036232736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:38,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564654832] [2021-07-09 18:52:38,389 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:38,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:52:38,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:38,501 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 18:52:38,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:38,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:38,512 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 18:52:38,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:38,690 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 18:52:38,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:38,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:38,701 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 18:52:38,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:39,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564654832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:39,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:39,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:39,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793594778] [2021-07-09 18:52:39,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:39,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:39,093 INFO L87 Difference]: Start difference. First operand 7060 states and 21477 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:40,843 INFO L93 Difference]: Finished difference Result 9291 states and 27924 transitions. [2021-07-09 18:52:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:52:40,843 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:40,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:40,857 INFO L225 Difference]: With dead ends: 9291 [2021-07-09 18:52:40,857 INFO L226 Difference]: Without dead ends: 9156 [2021-07-09 18:52:40,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1692.4ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:40,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9156 states. [2021-07-09 18:52:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9156 to 7056. [2021-07-09 18:52:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7056 states, 7055 states have (on average 3.043090007087172) internal successors, (21469), 7055 states have internal predecessors, (21469), 0 states have call successors, (0), 0 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 18:52:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7056 states to 7056 states and 21469 transitions. [2021-07-09 18:52:40,961 INFO L78 Accepts]: Start accepts. Automaton has 7056 states and 21469 transitions. Word has length 48 [2021-07-09 18:52:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:40,961 INFO L482 AbstractCegarLoop]: Abstraction has 7056 states and 21469 transitions. [2021-07-09 18:52:40,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7056 states and 21469 transitions. [2021-07-09 18:52:40,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:40,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:40,969 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:41,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:41,170 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:41,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1856678800, now seen corresponding path program 173 times [2021-07-09 18:52:41,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:41,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9536521] [2021-07-09 18:52:41,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:41,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:41,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9536521] [2021-07-09 18:52:41,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9536521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:41,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796884711] [2021-07-09 18:52:41,580 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:41,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:52:41,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:41,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:52:41,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:41,694 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 18:52:41,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:41,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:41,705 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 18:52:41,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:41,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-09 18:52:41,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:41,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:41,892 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 18:52:41,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:42,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796884711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:42,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:42,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:42,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009081207] [2021-07-09 18:52:42,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:42,288 INFO L87 Difference]: Start difference. First operand 7056 states and 21469 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:43,936 INFO L93 Difference]: Finished difference Result 9347 states and 28064 transitions. [2021-07-09 18:52:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:52:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:43,950 INFO L225 Difference]: With dead ends: 9347 [2021-07-09 18:52:43,950 INFO L226 Difference]: Without dead ends: 9229 [2021-07-09 18:52:43,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1736.4ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:52:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9229 states. [2021-07-09 18:52:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9229 to 7134. [2021-07-09 18:52:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 7133 states have (on average 3.0356091406140475) internal successors, (21653), 7133 states have internal predecessors, (21653), 0 states have call successors, (0), 0 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 18:52:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 21653 transitions. [2021-07-09 18:52:44,055 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 21653 transitions. Word has length 48 [2021-07-09 18:52:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:44,055 INFO L482 AbstractCegarLoop]: Abstraction has 7134 states and 21653 transitions. [2021-07-09 18:52:44,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:52:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 21653 transitions. [2021-07-09 18:52:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:44,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:44,063 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:44,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:44,264 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1056851578, now seen corresponding path program 174 times [2021-07-09 18:52:44,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:44,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53696397] [2021-07-09 18:52:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:44,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:44,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53696397] [2021-07-09 18:52:44,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53696397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:44,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457518949] [2021-07-09 18:52:44,663 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:44,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:52:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:44,780 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 18:52:44,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:44,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:44,791 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 18:52:44,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:44,972 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 18:52:44,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:44,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:44,983 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 18:52:44,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:45,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457518949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:45,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:45,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:45,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458168563] [2021-07-09 18:52:45,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:45,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:45,461 INFO L87 Difference]: Start difference. First operand 7134 states and 21653 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:47,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:47,588 INFO L93 Difference]: Finished difference Result 8066 states and 24404 transitions. [2021-07-09 18:52:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:52:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:47,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:47,600 INFO L225 Difference]: With dead ends: 8066 [2021-07-09 18:52:47,600 INFO L226 Difference]: Without dead ends: 8026 [2021-07-09 18:52:47,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 2073.4ms TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:52:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-07-09 18:52:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7152. [2021-07-09 18:52:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 7151 states have (on average 3.034260942525521) internal successors, (21698), 7151 states have internal predecessors, (21698), 0 states have call successors, (0), 0 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 18:52:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 21698 transitions. [2021-07-09 18:52:47,689 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 21698 transitions. Word has length 48 [2021-07-09 18:52:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:47,689 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 21698 transitions. [2021-07-09 18:52:47,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:47,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 21698 transitions. [2021-07-09 18:52:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:47,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:47,697 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:47,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:47,897 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash 828092734, now seen corresponding path program 175 times [2021-07-09 18:52:47,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:47,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876411473] [2021-07-09 18:52:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:48,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:48,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876411473] [2021-07-09 18:52:48,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876411473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:48,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557442854] [2021-07-09 18:52:48,285 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:48,406 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 18:52:48,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:48,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:48,430 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 18:52:48,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:48,622 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 18:52:48,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:48,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:48,633 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 18:52:48,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:49,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557442854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:49,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:49,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:49,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92691999] [2021-07-09 18:52:49,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:49,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:49,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:49,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:49,072 INFO L87 Difference]: Start difference. First operand 7152 states and 21698 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:50,902 INFO L93 Difference]: Finished difference Result 9212 states and 27694 transitions. [2021-07-09 18:52:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:50,916 INFO L225 Difference]: With dead ends: 9212 [2021-07-09 18:52:50,917 INFO L226 Difference]: Without dead ends: 9167 [2021-07-09 18:52:50,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1822.7ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:50,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9167 states. [2021-07-09 18:52:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9167 to 7146. [2021-07-09 18:52:51,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7146 states, 7145 states have (on average 3.034149755073478) internal successors, (21679), 7145 states have internal predecessors, (21679), 0 states have call successors, (0), 0 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 18:52:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7146 states to 7146 states and 21679 transitions. [2021-07-09 18:52:51,021 INFO L78 Accepts]: Start accepts. Automaton has 7146 states and 21679 transitions. Word has length 48 [2021-07-09 18:52:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:51,021 INFO L482 AbstractCegarLoop]: Abstraction has 7146 states and 21679 transitions. [2021-07-09 18:52:51,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 7146 states and 21679 transitions. [2021-07-09 18:52:51,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:51,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:51,029 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:51,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:51,229 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:51,230 INFO L82 PathProgramCache]: Analyzing trace with hash -118639066, now seen corresponding path program 176 times [2021-07-09 18:52:51,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:51,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175344607] [2021-07-09 18:52:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:51,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:51,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175344607] [2021-07-09 18:52:51,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175344607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:51,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807881012] [2021-07-09 18:52:51,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:51,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:52:51,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:51,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:51,766 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 18:52:51,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:51,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:51,777 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 18:52:51,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:51,967 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 18:52:51,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:51,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:51,981 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 18:52:51,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:52,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:52,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807881012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:52,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:52,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:52,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534892151] [2021-07-09 18:52:52,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:52,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:52,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:52,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:52,443 INFO L87 Difference]: Start difference. First operand 7146 states and 21679 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:54,129 INFO L93 Difference]: Finished difference Result 9294 states and 27923 transitions. [2021-07-09 18:52:54,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:54,145 INFO L225 Difference]: With dead ends: 9294 [2021-07-09 18:52:54,145 INFO L226 Difference]: Without dead ends: 9235 [2021-07-09 18:52:54,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1849.3ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9235 states. [2021-07-09 18:52:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9235 to 7140. [2021-07-09 18:52:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 7139 states have (on average 3.03445860764813) internal successors, (21663), 7139 states have internal predecessors, (21663), 0 states have call successors, (0), 0 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 18:52:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 21663 transitions. [2021-07-09 18:52:54,250 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 21663 transitions. Word has length 48 [2021-07-09 18:52:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:54,250 INFO L482 AbstractCegarLoop]: Abstraction has 7140 states and 21663 transitions. [2021-07-09 18:52:54,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:54,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 21663 transitions. [2021-07-09 18:52:54,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:54,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:54,258 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:54,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 18:52:54,459 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash -273076584, now seen corresponding path program 177 times [2021-07-09 18:52:54,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:54,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095378512] [2021-07-09 18:52:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:54,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095378512] [2021-07-09 18:52:54,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095378512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:54,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872564918] [2021-07-09 18:52:54,849 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:54,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:52:54,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:54,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:54,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:54,963 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 18:52:54,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:54,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:54,974 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 18:52:54,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:55,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:52:55,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:55,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:55,164 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 18:52:55,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2021-07-09 18:52:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:55,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872564918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:55,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:55,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:52:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653186448] [2021-07-09 18:52:55,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:52:55,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:52:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:52:55,625 INFO L87 Difference]: Start difference. First operand 7140 states and 21663 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:57,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:52:57,260 INFO L93 Difference]: Finished difference Result 9301 states and 27938 transitions. [2021-07-09 18:52:57,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:52:57,260 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:52:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:52:57,296 INFO L225 Difference]: With dead ends: 9301 [2021-07-09 18:52:57,296 INFO L226 Difference]: Without dead ends: 9169 [2021-07-09 18:52:57,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1788.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:52:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9169 states. [2021-07-09 18:52:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9169 to 7074. [2021-07-09 18:52:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7074 states, 7073 states have (on average 3.0395871624487487) internal successors, (21499), 7073 states have internal predecessors, (21499), 0 states have call successors, (0), 0 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 18:52:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7074 states to 7074 states and 21499 transitions. [2021-07-09 18:52:57,392 INFO L78 Accepts]: Start accepts. Automaton has 7074 states and 21499 transitions. Word has length 48 [2021-07-09 18:52:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:52:57,392 INFO L482 AbstractCegarLoop]: Abstraction has 7074 states and 21499 transitions. [2021-07-09 18:52:57,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:52:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 7074 states and 21499 transitions. [2021-07-09 18:52:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:52:57,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:52:57,400 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:52:57,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-09 18:52:57,601 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:52:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:52:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash 658320910, now seen corresponding path program 178 times [2021-07-09 18:52:57,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:52:57,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073738060] [2021-07-09 18:52:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:52:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:52:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:57,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:52:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073738060] [2021-07-09 18:52:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073738060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:57,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544192137] [2021-07-09 18:52:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:52:58,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:52:58,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:52:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:52:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:52:58,085 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 18:52:58,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:58,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:58,096 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 18:52:58,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:52:58,272 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 18:52:58,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:58,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:58,284 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 18:52:58,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:52:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:58,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544192137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:58,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:58,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-07-09 18:52:58,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301545712] [2021-07-09 18:52:58,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 18:52:58,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 18:52:58,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:52:58,684 INFO L87 Difference]: Start difference. First operand 7074 states and 21499 transitions. Second operand has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:53:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:00,367 INFO L93 Difference]: Finished difference Result 9287 states and 27898 transitions. [2021-07-09 18:53:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:53:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 48 [2021-07-09 18:53:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:00,382 INFO L225 Difference]: With dead ends: 9287 [2021-07-09 18:53:00,382 INFO L226 Difference]: Without dead ends: 9129 [2021-07-09 18:53:00,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1694.5ms TimeCoverageRelationStatistics Valid=234, Invalid=3188, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:53:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-07-09 18:53:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7047. [2021-07-09 18:53:00,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 3.04342889582742) internal successors, (21444), 7046 states have internal predecessors, (21444), 0 states have call successors, (0), 0 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 18:53:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 21444 transitions. [2021-07-09 18:53:00,485 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 21444 transitions. Word has length 48 [2021-07-09 18:53:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:00,485 INFO L482 AbstractCegarLoop]: Abstraction has 7047 states and 21444 transitions. [2021-07-09 18:53:00,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.2564102564102564) internal successors, (88), 38 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 18:53:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 21444 transitions. [2021-07-09 18:53:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:00,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:00,493 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:00,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-09 18:53:00,700 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:00,700 INFO L82 PathProgramCache]: Analyzing trace with hash -16294396, now seen corresponding path program 179 times [2021-07-09 18:53:00,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:00,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056368608] [2021-07-09 18:53:00,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:01,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:01,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056368608] [2021-07-09 18:53:01,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056368608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:01,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659340388] [2021-07-09 18:53:01,084 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:01,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:53:01,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:53:01,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:01,226 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 18:53:01,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:01,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:01,238 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 18:53:01,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:53:01,418 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 18:53:01,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:01,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:01,429 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 18:53:01,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:01,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659340388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:01,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:01,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:01,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237653070] [2021-07-09 18:53:01,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:01,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:01,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:01,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:01,865 INFO L87 Difference]: Start difference. First operand 7047 states and 21444 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:03,758 INFO L93 Difference]: Finished difference Result 9293 states and 27929 transitions. [2021-07-09 18:53:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:53:03,759 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:03,773 INFO L225 Difference]: With dead ends: 9293 [2021-07-09 18:53:03,773 INFO L226 Difference]: Without dead ends: 9175 [2021-07-09 18:53:03,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1797.3ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:53:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-07-09 18:53:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 7071. [2021-07-09 18:53:03,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 7070 states have (on average 3.0401697312588403) internal successors, (21494), 7070 states have internal predecessors, (21494), 0 states have call successors, (0), 0 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 18:53:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 21494 transitions. [2021-07-09 18:53:03,879 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 21494 transitions. Word has length 48 [2021-07-09 18:53:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:03,879 INFO L482 AbstractCegarLoop]: Abstraction has 7071 states and 21494 transitions. [2021-07-09 18:53:03,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 21494 transitions. [2021-07-09 18:53:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:03,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:03,888 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:04,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 18:53:04,088 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash 91155972, now seen corresponding path program 180 times [2021-07-09 18:53:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378965700] [2021-07-09 18:53:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:04,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:04,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378965700] [2021-07-09 18:53:04,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378965700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:04,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639005285] [2021-07-09 18:53:04,475 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:04,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:53:04,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:04,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:53:04,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:04,590 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 18:53:04,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:04,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:04,601 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 18:53:04,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:53:04,783 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 18:53:04,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:04,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:04,795 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 18:53:04,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:05,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:05,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639005285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:05,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:05,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:05,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881349961] [2021-07-09 18:53:05,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:05,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:05,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:05,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:05,272 INFO L87 Difference]: Start difference. First operand 7071 states and 21494 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:07,209 INFO L93 Difference]: Finished difference Result 7993 states and 24222 transitions. [2021-07-09 18:53:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:53:07,210 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:07,221 INFO L225 Difference]: With dead ends: 7993 [2021-07-09 18:53:07,221 INFO L226 Difference]: Without dead ends: 7953 [2021-07-09 18:53:07,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 2066.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:53:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2021-07-09 18:53:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7083. [2021-07-09 18:53:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 7082 states have (on average 3.0391132448460887) internal successors, (21523), 7082 states have internal predecessors, (21523), 0 states have call successors, (0), 0 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 18:53:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 21523 transitions. [2021-07-09 18:53:07,309 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 21523 transitions. Word has length 48 [2021-07-09 18:53:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:07,309 INFO L482 AbstractCegarLoop]: Abstraction has 7083 states and 21523 transitions. [2021-07-09 18:53:07,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 21523 transitions. [2021-07-09 18:53:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:07,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:07,318 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:07,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:07,518 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:07,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:07,518 INFO L82 PathProgramCache]: Analyzing trace with hash -785026492, now seen corresponding path program 181 times [2021-07-09 18:53:07,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:07,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590179618] [2021-07-09 18:53:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:07,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:07,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590179618] [2021-07-09 18:53:07,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590179618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:07,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718232840] [2021-07-09 18:53:07,939 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:53:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:08,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:53:08,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:08,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:08,082 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 18:53:08,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:53:08,282 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 18:53:08,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:08,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:08,294 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 18:53:08,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718232840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:08,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:08,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:08,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349431102] [2021-07-09 18:53:08,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:08,764 INFO L87 Difference]: Start difference. First operand 7083 states and 21523 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:10,584 INFO L93 Difference]: Finished difference Result 9148 states and 27531 transitions. [2021-07-09 18:53:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:53:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:10,601 INFO L225 Difference]: With dead ends: 9148 [2021-07-09 18:53:10,601 INFO L226 Difference]: Without dead ends: 9109 [2021-07-09 18:53:10,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1959.6ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:53:10,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9109 states. [2021-07-09 18:53:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9109 to 7079. [2021-07-09 18:53:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7079 states, 7078 states have (on average 3.0392766318168976) internal successors, (21512), 7078 states have internal predecessors, (21512), 0 states have call successors, (0), 0 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 18:53:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 21512 transitions. [2021-07-09 18:53:10,718 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 21512 transitions. Word has length 48 [2021-07-09 18:53:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:10,718 INFO L482 AbstractCegarLoop]: Abstraction has 7079 states and 21512 transitions. [2021-07-09 18:53:10,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 21512 transitions. [2021-07-09 18:53:10,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:10,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:10,727 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:10,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-07-09 18:53:10,942 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:10,943 INFO L82 PathProgramCache]: Analyzing trace with hash -643311352, now seen corresponding path program 182 times [2021-07-09 18:53:10,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:10,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967910750] [2021-07-09 18:53:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:11,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:11,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967910750] [2021-07-09 18:53:11,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967910750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:11,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962074733] [2021-07-09 18:53:11,359 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:11,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:53:11,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:53:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:11,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:53:11,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:11,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:11,547 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 18:53:11,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:53:11,745 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 18:53:11,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:11,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:11,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:11,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:12,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962074733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:12,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:12,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:12,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381620466] [2021-07-09 18:53:12,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:12,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:12,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:12,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:12,231 INFO L87 Difference]: Start difference. First operand 7079 states and 21512 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:14,087 INFO L93 Difference]: Finished difference Result 9236 states and 27776 transitions. [2021-07-09 18:53:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:53:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:14,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:14,101 INFO L225 Difference]: With dead ends: 9236 [2021-07-09 18:53:14,101 INFO L226 Difference]: Without dead ends: 9179 [2021-07-09 18:53:14,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1934.7ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:53:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2021-07-09 18:53:14,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 7075. [2021-07-09 18:53:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7075 states, 7074 states have (on average 3.039440203562341) internal successors, (21501), 7074 states have internal predecessors, (21501), 0 states have call successors, (0), 0 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 18:53:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7075 states to 7075 states and 21501 transitions. [2021-07-09 18:53:14,206 INFO L78 Accepts]: Start accepts. Automaton has 7075 states and 21501 transitions. Word has length 48 [2021-07-09 18:53:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:14,206 INFO L482 AbstractCegarLoop]: Abstraction has 7075 states and 21501 transitions. [2021-07-09 18:53:14,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7075 states and 21501 transitions. [2021-07-09 18:53:14,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:14,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:14,214 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:14,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-07-09 18:53:14,414 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1926458812, now seen corresponding path program 183 times [2021-07-09 18:53:14,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:14,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569293651] [2021-07-09 18:53:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:14,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:14,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569293651] [2021-07-09 18:53:14,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569293651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375526307] [2021-07-09 18:53:14,802 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:14,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:53:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:53:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:14,917 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 18:53:14,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:14,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:14,928 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 18:53:14,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:53:15,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:53:15,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:15,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:15,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:15,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:32 [2021-07-09 18:53:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:15,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375526307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:15,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:15,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:15,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972110389] [2021-07-09 18:53:15,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:15,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:15,607 INFO L87 Difference]: Start difference. First operand 7075 states and 21501 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:17,154 INFO L93 Difference]: Finished difference Result 9245 states and 27796 transitions. [2021-07-09 18:53:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:53:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:17,170 INFO L225 Difference]: With dead ends: 9245 [2021-07-09 18:53:17,170 INFO L226 Difference]: Without dead ends: 9159 [2021-07-09 18:53:17,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 1833.3ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:53:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9159 states. [2021-07-09 18:53:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9159 to 7055. [2021-07-09 18:53:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7055 states, 7054 states have (on average 3.0425290615253755) internal successors, (21462), 7054 states have internal predecessors, (21462), 0 states have call successors, (0), 0 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 18:53:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7055 states to 7055 states and 21462 transitions. [2021-07-09 18:53:17,308 INFO L78 Accepts]: Start accepts. Automaton has 7055 states and 21462 transitions. Word has length 48 [2021-07-09 18:53:17,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:17,308 INFO L482 AbstractCegarLoop]: Abstraction has 7055 states and 21462 transitions. [2021-07-09 18:53:17,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7055 states and 21462 transitions. [2021-07-09 18:53:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:17,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:17,316 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:17,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:17,521 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1626386124, now seen corresponding path program 184 times [2021-07-09 18:53:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157860966] [2021-07-09 18:53:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:17,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:17,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157860966] [2021-07-09 18:53:17,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157860966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:17,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170386647] [2021-07-09 18:53:17,905 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:17,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:53:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:53:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:53:18,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:18,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:18,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:53:18,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:53:18,213 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 18:53:18,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:18,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:18,225 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 18:53:18,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:18,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170386647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:18,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:18,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:18,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785148471] [2021-07-09 18:53:18,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:18,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:18,681 INFO L87 Difference]: Start difference. First operand 7055 states and 21462 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:20,437 INFO L93 Difference]: Finished difference Result 9277 states and 27881 transitions. [2021-07-09 18:53:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:53:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:20,452 INFO L225 Difference]: With dead ends: 9277 [2021-07-09 18:53:20,452 INFO L226 Difference]: Without dead ends: 9142 [2021-07-09 18:53:20,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1811.9ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:53:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9142 states. [2021-07-09 18:53:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9142 to 7051. [2021-07-09 18:53:20,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 7050 states have (on average 3.042695035460993) internal successors, (21451), 7050 states have internal predecessors, (21451), 0 states have call successors, (0), 0 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 18:53:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 21451 transitions. [2021-07-09 18:53:20,563 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 21451 transitions. Word has length 48 [2021-07-09 18:53:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:20,563 INFO L482 AbstractCegarLoop]: Abstraction has 7051 states and 21451 transitions. [2021-07-09 18:53:20,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:20,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 21451 transitions. [2021-07-09 18:53:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:20,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:20,571 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:20,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:20,772 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash -133159438, now seen corresponding path program 185 times [2021-07-09 18:53:20,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:20,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935576664] [2021-07-09 18:53:20,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:21,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:21,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935576664] [2021-07-09 18:53:21,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935576664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859595221] [2021-07-09 18:53:21,166 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:21,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:53:21,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:53:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:21,282 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 18:53:21,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:21,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:21,293 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 18:53:21,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:53:21,501 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 18:53:21,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:21,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:21,512 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 18:53:21,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:21,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859595221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:21,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:21,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:21,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096946211] [2021-07-09 18:53:21,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:21,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:21,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:21,971 INFO L87 Difference]: Start difference. First operand 7051 states and 21451 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:23,598 INFO L93 Difference]: Finished difference Result 9273 states and 27870 transitions. [2021-07-09 18:53:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:53:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:23,611 INFO L225 Difference]: With dead ends: 9273 [2021-07-09 18:53:23,611 INFO L226 Difference]: Without dead ends: 9125 [2021-07-09 18:53:23,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1872.3ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:53:23,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2021-07-09 18:53:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 7047. [2021-07-09 18:53:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 3.0432869713312516) internal successors, (21443), 7046 states have internal predecessors, (21443), 0 states have call successors, (0), 0 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 18:53:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 21443 transitions. [2021-07-09 18:53:23,713 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 21443 transitions. Word has length 48 [2021-07-09 18:53:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:23,713 INFO L482 AbstractCegarLoop]: Abstraction has 7047 states and 21443 transitions. [2021-07-09 18:53:23,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 21443 transitions. [2021-07-09 18:53:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:23,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:23,721 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:23,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:23,922 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1443853864, now seen corresponding path program 186 times [2021-07-09 18:53:23,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:23,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035911931] [2021-07-09 18:53:23,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:24,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:24,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035911931] [2021-07-09 18:53:24,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035911931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:24,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951407030] [2021-07-09 18:53:24,307 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:24,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:53:24,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:53:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:53:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:24,422 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 18:53:24,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:24,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:24,433 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 18:53:24,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-07-09 18:53:24,618 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 18:53:24,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:24,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:24,629 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 18:53:24,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:25,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951407030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:25,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:25,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:25,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432596754] [2021-07-09 18:53:25,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:25,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:25,078 INFO L87 Difference]: Start difference. First operand 7047 states and 21443 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:26,846 INFO L93 Difference]: Finished difference Result 9365 states and 28106 transitions. [2021-07-09 18:53:26,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:53:26,846 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:26,860 INFO L225 Difference]: With dead ends: 9365 [2021-07-09 18:53:26,860 INFO L226 Difference]: Without dead ends: 9247 [2021-07-09 18:53:26,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1830.0ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:53:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9247 states. [2021-07-09 18:53:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9247 to 7143. [2021-07-09 18:53:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 3.034864183702044) internal successors, (21675), 7142 states have internal predecessors, (21675), 0 states have call successors, (0), 0 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 18:53:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 21675 transitions. [2021-07-09 18:53:26,966 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 21675 transitions. Word has length 48 [2021-07-09 18:53:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:26,966 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 21675 transitions. [2021-07-09 18:53:26,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 21675 transitions. [2021-07-09 18:53:26,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:26,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:26,974 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:27,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:27,175 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:27,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1469676514, now seen corresponding path program 187 times [2021-07-09 18:53:27,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:27,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360346666] [2021-07-09 18:53:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:27,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:53:27,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360346666] [2021-07-09 18:53:27,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360346666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:27,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13129913] [2021-07-09 18:53:27,607 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:53:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-09 18:53:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:53:27,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-07-09 18:53:27,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:27,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:27,735 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 18:53:27,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:28 [2021-07-09 18:53:27,918 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 18:53:27,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:53:27,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:53:27,929 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 18:53:27,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:32 [2021-07-09 18:53:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:53:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13129913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:53:28,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:53:28,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 40 [2021-07-09 18:53:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217220331] [2021-07-09 18:53:28,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-07-09 18:53:28,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:53:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-07-09 18:53:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:53:28,379 INFO L87 Difference]: Start difference. First operand 7143 states and 21675 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:53:30,511 INFO L93 Difference]: Finished difference Result 8075 states and 24426 transitions. [2021-07-09 18:53:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:53:30,511 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 48 [2021-07-09 18:53:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:53:30,524 INFO L225 Difference]: With dead ends: 8075 [2021-07-09 18:53:30,524 INFO L226 Difference]: Without dead ends: 8035 [2021-07-09 18:53:30,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 2107.9ms TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:53:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2021-07-09 18:53:30,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 7161. [2021-07-09 18:53:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7161 states, 7160 states have (on average 3.0335195530726256) internal successors, (21720), 7160 states have internal predecessors, (21720), 0 states have call successors, (0), 0 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 18:53:30,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7161 states to 7161 states and 21720 transitions. [2021-07-09 18:53:30,616 INFO L78 Accepts]: Start accepts. Automaton has 7161 states and 21720 transitions. Word has length 48 [2021-07-09 18:53:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:53:30,616 INFO L482 AbstractCegarLoop]: Abstraction has 7161 states and 21720 transitions. [2021-07-09 18:53:30,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 18:53:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7161 states and 21720 transitions. [2021-07-09 18:53:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-07-09 18:53:30,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:53:30,626 INFO L508 BasicCegarLoop]: trace histogram [2, 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, 1, 1] [2021-07-09 18:53:30,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:53:30,845 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:53:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:53:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1240917670, now seen corresponding path program 188 times [2021-07-09 18:53:30,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:53:30,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921156493] [2021-07-09 18:53:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:53:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-07-09 18:53:31,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277 [2021-07-09 18:53:31,211 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:53:31,213 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:53:31,214 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:53:31,214 INFO L202 PluginConnector]: Adding new model queue-add-3-nl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:53:31 BasicIcfg [2021-07-09 18:53:31,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:53:31,214 INFO L168 Benchmark]: Toolchain (without parser) took 798486.57 ms. Allocated memory was 207.6 MB in the beginning and 952.1 MB in the end (delta: 744.5 MB). Free memory was 187.4 MB in the beginning and 308.1 MB in the end (delta: -120.6 MB). Peak memory consumption was 625.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:53:31,214 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 207.6 MB. Free memory was 188.6 MB in the beginning and 188.5 MB in the end (delta: 85.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:53:31,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.87 ms. Allocated memory is still 207.6 MB. Free memory was 187.3 MB in the beginning and 185.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:53:31,214 INFO L168 Benchmark]: Boogie Preprocessor took 18.19 ms. Allocated memory is still 207.6 MB. Free memory was 185.8 MB in the beginning and 184.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:53:31,215 INFO L168 Benchmark]: RCFGBuilder took 327.81 ms. Allocated memory is still 207.6 MB. Free memory was 184.7 MB in the beginning and 168.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:53:31,215 INFO L168 Benchmark]: TraceAbstraction took 798118.08 ms. Allocated memory was 207.6 MB in the beginning and 952.1 MB in the end (delta: 744.5 MB). Free memory was 167.6 MB in the beginning and 308.1 MB in the end (delta: -140.5 MB). Peak memory consumption was 605.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:53:31,215 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 0.09 ms. Allocated memory is still 207.6 MB. Free memory was 188.6 MB in the beginning and 188.5 MB in the end (delta: 85.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.87 ms. Allocated memory is still 207.6 MB. Free memory was 187.3 MB in the beginning and 185.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.19 ms. Allocated memory is still 207.6 MB. Free memory was 185.8 MB in the beginning and 184.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 327.81 ms. Allocated memory is still 207.6 MB. Free memory was 184.7 MB in the beginning and 168.1 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 798118.08 ms. Allocated memory was 207.6 MB in the beginning and 952.1 MB in the end (delta: 744.5 MB). Free memory was 167.6 MB in the beginning and 308.1 MB in the end (delta: -140.5 MB). Peak memory consumption was 605.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 96]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 49 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 71 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 798038.6ms, OverallIterations: 278, TraceHistogramMax: 2, EmptinessCheckTime: 1944.7ms, AutomataDifference: 467531.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 50.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40339 SDtfs, 68785 SDslu, 655935 SDs, 0 SdLazy, 470129 SolverSat, 10414 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 168661.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22381 GetRequests, 7455 SyntacticMatches, 636 SemanticMatches, 14290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208166 ImplicationChecksByTransitivity, 446512.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7281occurred in iteration=181, InterpolantAutomatonStates: 9146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22722.7ms AutomataMinimizationTime, 277 MinimizatonAttempts, 393429 StatesRemovedByMinimization, 273 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1441.5ms SsaConstructionTime, 3419.3ms SatisfiabilityAnalysisTime, 239436.4ms InterpolantComputationTime, 23729 NumberOfCodeBlocks, 23729 NumberOfCodeBlocksAsserted, 846 NumberOfCheckSat, 23179 ConstructedInterpolants, 0 QuantifiedInterpolants, 557658 SizeOfPredicates, 3232 NumberOfNonLiveVariables, 29739 ConjunctsInSsa, 10233 ConjunctsInUnsatCore, 550 InterpolantComputations, 5 PerfectInterpolantSequences, 73/6320 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