/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/POPL2022/incr-decr09.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 11:59:59,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 11:59:59,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 11:59:59,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-30 11:59:59,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-30 11:59:59,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 11:59:59,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 11:59:59,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-30 11:59:59,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-30 11:59:59,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 11:59:59,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 11:59:59,589 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 11:59:59,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 11:59:59,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 11:59:59,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 11:59:59,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:59:59,591 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 11:59:59,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 11:59:59,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 11:59:59,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 11:59:59,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-30 11:59:59,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 11:59:59,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 11:59:59,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 11:59:59,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 11:59:59,850 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 11:59:59,851 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 11:59:59,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr09.bpl [2021-06-30 11:59:59,852 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/incr-decr09.bpl' [2021-06-30 11:59:59,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 11:59:59,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 11:59:59,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 11:59:59,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 11:59:59,877 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 11:59:59,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 11:59:59,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 11:59:59,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 11:59:59,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 11:59:59,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... [2021-06-30 11:59:59,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 11:59:59,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 11:59:59,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 11:59:59,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 11:59:59,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 11:59:59,979 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 11:59:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 11:59:59,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 11:59:59,980 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 11:59:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 11:59:59,980 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 11:59:59,980 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-30 12:00:00,097 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 12:00:00,097 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 12:00:00,098 INFO L202 PluginConnector]: Adding new model incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 12:00:00 BoogieIcfgContainer [2021-06-30 12:00:00,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 12:00:00,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 12:00:00,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 12:00:00,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 12:00:00,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 11:59:59" (1/2) ... [2021-06-30 12:00:00,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1915bb and model type incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 12:00:00, skipping insertion in model container [2021-06-30 12:00:00,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 12:00:00" (2/2) ... [2021-06-30 12:00:00,107 INFO L111 eAbstractionObserver]: Analyzing ICFG incr-decr09.bpl [2021-06-30 12:00:00,113 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-30 12:00:00,114 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 12:00:00,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 12:00:00,115 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 12:00:00,275 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-06-30 12:00:00,290 INFO L255 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-06-30 12:00:00,303 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 12:00:00,303 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 12:00:00,303 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 12:00:00,303 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 12:00:00,303 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 12:00:00,303 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 12:00:00,303 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 12:00:00,304 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 12:00:00,311 INFO L112 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 58 transitions, 188 flow [2021-06-30 12:00:06,760 INFO L134 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 39369 states, 39366 states have (on average 8.750063506579282) internal successors, (344455), 39366 states have internal predecessors, (344455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 39369 states, 39366 states have (on average 8.750063506579282) internal successors, (344455), 39366 states have internal predecessors, (344455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-30 12:00:07,473 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:07,474 INFO L504 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] [2021-06-30 12:00:07,474 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1361129196, now seen corresponding path program 1 times [2021-06-30 12:00:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:07,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870788431] [2021-06-30 12:00:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:07,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870788431] [2021-06-30 12:00:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870788431] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:00:07,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:00:07,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 12:00:07,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69803972] [2021-06-30 12:00:07,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 12:00:07,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:07,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 12:00:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 12:00:07,758 INFO L87 Difference]: Start difference. First operand has 39369 states, 39366 states have (on average 8.750063506579282) internal successors, (344455), 39366 states have internal predecessors, (344455), 0 states have call successors, (0), 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, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:08,652 INFO L93 Difference]: Finished difference Result 40900 states and 357256 transitions. [2021-06-30 12:00:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 12:00:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-30 12:00:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:09,439 INFO L225 Difference]: With dead ends: 40900 [2021-06-30 12:00:09,439 INFO L226 Difference]: Without dead ends: 40890 [2021-06-30 12:00:09,440 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 12:00:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40890 states. [2021-06-30 12:00:15,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40890 to 40890. [2021-06-30 12:00:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40890 states, 40889 states have (on average 8.73589473941647) internal successors, (357202), 40889 states have internal predecessors, (357202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40890 states to 40890 states and 357202 transitions. [2021-06-30 12:00:16,368 INFO L78 Accepts]: Start accepts. Automaton has 40890 states and 357202 transitions. Word has length 29 [2021-06-30 12:00:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:16,369 INFO L482 AbstractCegarLoop]: Abstraction has 40890 states and 357202 transitions. [2021-06-30 12:00:16,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:16,369 INFO L276 IsEmpty]: Start isEmpty. Operand 40890 states and 357202 transitions. [2021-06-30 12:00:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-30 12:00:16,606 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:16,606 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:00:16,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 12:00:16,607 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:16,607 INFO L82 PathProgramCache]: Analyzing trace with hash -860641812, now seen corresponding path program 1 times [2021-06-30 12:00:16,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:16,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037161277] [2021-06-30 12:00:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:16,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037161277] [2021-06-30 12:00:16,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037161277] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:00:16,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:00:16,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 12:00:16,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469523264] [2021-06-30 12:00:16,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 12:00:16,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:16,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 12:00:16,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 12:00:16,702 INFO L87 Difference]: Start difference. First operand 40890 states and 357202 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:17,584 INFO L93 Difference]: Finished difference Result 48310 states and 420425 transitions. [2021-06-30 12:00:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 12:00:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-30 12:00:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:18,236 INFO L225 Difference]: With dead ends: 48310 [2021-06-30 12:00:18,237 INFO L226 Difference]: Without dead ends: 48163 [2021-06-30 12:00:18,237 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 12:00:22,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48163 states. [2021-06-30 12:00:24,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48163 to 46686. [2021-06-30 12:00:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46686 states, 46685 states have (on average 8.71742529720467) internal successors, (406973), 46685 states have internal predecessors, (406973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46686 states to 46686 states and 406973 transitions. [2021-06-30 12:00:24,967 INFO L78 Accepts]: Start accepts. Automaton has 46686 states and 406973 transitions. Word has length 31 [2021-06-30 12:00:24,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:24,967 INFO L482 AbstractCegarLoop]: Abstraction has 46686 states and 406973 transitions. [2021-06-30 12:00:24,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 46686 states and 406973 transitions. [2021-06-30 12:00:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-30 12:00:25,154 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:25,154 INFO L504 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] [2021-06-30 12:00:25,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 12:00:25,154 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2120683296, now seen corresponding path program 1 times [2021-06-30 12:00:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:25,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411568155] [2021-06-30 12:00:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:25,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411568155] [2021-06-30 12:00:25,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411568155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:25,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125117353] [2021-06-30 12:00:25,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:25,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:25,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-30 12:00:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:00:25,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125117353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:25,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:25,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-30 12:00:25,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175475967] [2021-06-30 12:00:25,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 12:00:25,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:25,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 12:00:25,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 12:00:25,783 INFO L87 Difference]: Start difference. First operand 46686 states and 406973 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2021-06-30 12:00:26,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:26,920 INFO L93 Difference]: Finished difference Result 64335 states and 559263 transitions. [2021-06-30 12:00:26,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 12:00:26,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 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 [2021-06-30 12:00:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:27,971 INFO L225 Difference]: With dead ends: 64335 [2021-06-30 12:00:27,972 INFO L226 Difference]: Without dead ends: 63360 [2021-06-30 12:00:27,972 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 12:00:33,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63360 states. [2021-06-30 12:00:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63360 to 56418. [2021-06-30 12:00:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56418 states, 56417 states have (on average 8.72205186379992) internal successors, (492072), 56417 states have internal predecessors, (492072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56418 states to 56418 states and 492072 transitions. [2021-06-30 12:00:35,948 INFO L78 Accepts]: Start accepts. Automaton has 56418 states and 492072 transitions. Word has length 33 [2021-06-30 12:00:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:35,949 INFO L482 AbstractCegarLoop]: Abstraction has 56418 states and 492072 transitions. [2021-06-30 12:00:35,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2021-06-30 12:00:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 56418 states and 492072 transitions. [2021-06-30 12:00:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-30 12:00:36,185 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:36,185 INFO L504 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] [2021-06-30 12:00:36,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-30 12:00:36,649 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1717176222, now seen corresponding path program 1 times [2021-06-30 12:00:36,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:36,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197090700] [2021-06-30 12:00:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:36,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:36,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197090700] [2021-06-30 12:00:36,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197090700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:36,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895764407] [2021-06-30 12:00:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:36,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-30 12:00:36,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:36,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895764407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:36,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:36,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-30 12:00:36,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560490955] [2021-06-30 12:00:36,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 12:00:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:36,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 12:00:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 12:00:36,913 INFO L87 Difference]: Start difference. First operand 56418 states and 492072 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:38,284 INFO L93 Difference]: Finished difference Result 84538 states and 736662 transitions. [2021-06-30 12:00:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 12:00:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-30 12:00:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:38,850 INFO L225 Difference]: With dead ends: 84538 [2021-06-30 12:00:38,850 INFO L226 Difference]: Without dead ends: 80536 [2021-06-30 12:00:38,851 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 12:00:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80536 states. [2021-06-30 12:00:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80536 to 65082. [2021-06-30 12:00:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65082 states, 65081 states have (on average 8.744994698913661) internal successors, (569133), 65081 states have internal predecessors, (569133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65082 states to 65082 states and 569133 transitions. [2021-06-30 12:00:48,005 INFO L78 Accepts]: Start accepts. Automaton has 65082 states and 569133 transitions. Word has length 35 [2021-06-30 12:00:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:00:48,005 INFO L482 AbstractCegarLoop]: Abstraction has 65082 states and 569133 transitions. [2021-06-30 12:00:48,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:00:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 65082 states and 569133 transitions. [2021-06-30 12:00:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-30 12:00:48,567 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:00:48,567 INFO L504 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] [2021-06-30 12:00:48,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:48,770 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:00:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:00:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1028083064, now seen corresponding path program 1 times [2021-06-30 12:00:48,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:00:48,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668703013] [2021-06-30 12:00:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:00:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:48,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:00:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668703013] [2021-06-30 12:00:48,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668703013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141899998] [2021-06-30 12:00:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:00:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:00:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-30 12:00:48,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:00:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:00:49,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141899998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:00:49,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:00:49,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-30 12:00:49,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734856372] [2021-06-30 12:00:49,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-30 12:00:49,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:00:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-30 12:00:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 12:00:49,010 INFO L87 Difference]: Start difference. First operand 65082 states and 569133 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-06-30 12:00:50,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:00:50,741 INFO L93 Difference]: Finished difference Result 100095 states and 875216 transitions. [2021-06-30 12:00:50,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-30 12:00:50,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 [2021-06-30 12:00:50,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:00:51,666 INFO L225 Difference]: With dead ends: 100095 [2021-06-30 12:00:51,666 INFO L226 Difference]: Without dead ends: 88788 [2021-06-30 12:00:51,666 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-30 12:00:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88788 states. [2021-06-30 12:01:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88788 to 67398. [2021-06-30 12:01:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67398 states, 67397 states have (on average 8.767274507767407) internal successors, (590888), 67397 states have internal predecessors, (590888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67398 states to 67398 states and 590888 transitions. [2021-06-30 12:01:01,672 INFO L78 Accepts]: Start accepts. Automaton has 67398 states and 590888 transitions. Word has length 37 [2021-06-30 12:01:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:01:01,672 INFO L482 AbstractCegarLoop]: Abstraction has 67398 states and 590888 transitions. [2021-06-30 12:01:01,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-06-30 12:01:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 67398 states and 590888 transitions. [2021-06-30 12:01:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-30 12:01:02,121 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:01:02,121 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:01:02,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:02,334 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:01:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:01:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1297776154, now seen corresponding path program 1 times [2021-06-30 12:01:02,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:01:02,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834031108] [2021-06-30 12:01:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:01:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:01:02,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:01:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834031108] [2021-06-30 12:01:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834031108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220191294] [2021-06-30 12:01:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:02,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:02,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-30 12:01:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:01:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:01:02,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220191294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:02,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:01:02,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-30 12:01:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923569559] [2021-06-30 12:01:02,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-30 12:01:02,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:01:02,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-30 12:01:02,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 12:01:02,639 INFO L87 Difference]: Start difference. First operand 67398 states and 590888 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:05,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:01:05,240 INFO L93 Difference]: Finished difference Result 105274 states and 923245 transitions. [2021-06-30 12:01:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-30 12:01:05,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-06-30 12:01:05,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:01:06,287 INFO L225 Difference]: With dead ends: 105274 [2021-06-30 12:01:06,287 INFO L226 Difference]: Without dead ends: 82121 [2021-06-30 12:01:06,287 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-30 12:01:12,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82121 states. [2021-06-30 12:01:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82121 to 62070. [2021-06-30 12:01:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62070 states, 62069 states have (on average 8.7810178994345) internal successors, (545029), 62069 states have internal predecessors, (545029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62070 states to 62070 states and 545029 transitions. [2021-06-30 12:01:15,279 INFO L78 Accepts]: Start accepts. Automaton has 62070 states and 545029 transitions. Word has length 39 [2021-06-30 12:01:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:01:15,279 INFO L482 AbstractCegarLoop]: Abstraction has 62070 states and 545029 transitions. [2021-06-30 12:01:15,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 62070 states and 545029 transitions. [2021-06-30 12:01:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-30 12:01:15,793 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:01:15,793 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:01:16,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:16,009 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:01:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:01:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1772186076, now seen corresponding path program 1 times [2021-06-30 12:01:16,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:01:16,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139997687] [2021-06-30 12:01:16,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:01:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:16,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:01:16,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139997687] [2021-06-30 12:01:16,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139997687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:16,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161629140] [2021-06-30 12:01:16,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-30 12:01:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:01:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:16,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161629140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:16,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:01:16,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-30 12:01:16,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037910507] [2021-06-30 12:01:16,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-30 12:01:16,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:01:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-30 12:01:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 12:01:16,225 INFO L87 Difference]: Start difference. First operand 62070 states and 545029 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:01:18,028 INFO L93 Difference]: Finished difference Result 100143 states and 880585 transitions. [2021-06-30 12:01:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-30 12:01:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-30 12:01:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:01:18,747 INFO L225 Difference]: With dead ends: 100143 [2021-06-30 12:01:18,747 INFO L226 Difference]: Without dead ends: 64669 [2021-06-30 12:01:18,748 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-30 12:01:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64669 states. [2021-06-30 12:01:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64669 to 52026. [2021-06-30 12:01:25,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52026 states, 52025 states have (on average 8.7971552138395) internal successors, (457672), 52025 states have internal predecessors, (457672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:26,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52026 states to 52026 states and 457672 transitions. [2021-06-30 12:01:26,654 INFO L78 Accepts]: Start accepts. Automaton has 52026 states and 457672 transitions. Word has length 41 [2021-06-30 12:01:26,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:01:26,655 INFO L482 AbstractCegarLoop]: Abstraction has 52026 states and 457672 transitions. [2021-06-30 12:01:26,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:26,655 INFO L276 IsEmpty]: Start isEmpty. Operand 52026 states and 457672 transitions. [2021-06-30 12:01:27,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-30 12:01:27,078 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:01:27,078 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:01:27,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-30 12:01:27,293 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:01:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:01:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash -47332006, now seen corresponding path program 1 times [2021-06-30 12:01:27,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:01:27,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661286135] [2021-06-30 12:01:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:01:27,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:27,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:01:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661286135] [2021-06-30 12:01:27,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661286135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:27,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887336170] [2021-06-30 12:01:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:27,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-30 12:01:27,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:01:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:27,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887336170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:27,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:01:27,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-30 12:01:27,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495329032] [2021-06-30 12:01:27,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-30 12:01:27,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:01:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-30 12:01:27,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-30 12:01:27,622 INFO L87 Difference]: Start difference. First operand 52026 states and 457672 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:01:29,827 INFO L93 Difference]: Finished difference Result 88090 states and 777332 transitions. [2021-06-30 12:01:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-30 12:01:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-30 12:01:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:01:30,271 INFO L225 Difference]: With dead ends: 88090 [2021-06-30 12:01:30,271 INFO L226 Difference]: Without dead ends: 46216 [2021-06-30 12:01:30,271 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-30 12:01:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46216 states. [2021-06-30 12:01:36,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46216 to 41442. [2021-06-30 12:01:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41442 states, 41441 states have (on average 8.837938273690307) internal successors, (366253), 41441 states have internal predecessors, (366253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41442 states to 41442 states and 366253 transitions. [2021-06-30 12:01:36,499 INFO L78 Accepts]: Start accepts. Automaton has 41442 states and 366253 transitions. Word has length 43 [2021-06-30 12:01:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:01:36,499 INFO L482 AbstractCegarLoop]: Abstraction has 41442 states and 366253 transitions. [2021-06-30 12:01:36,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 41442 states and 366253 transitions. [2021-06-30 12:01:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-30 12:01:36,644 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:01:36,644 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:01:36,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:36,845 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:01:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:01:36,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1690180332, now seen corresponding path program 1 times [2021-06-30 12:01:36,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:01:36,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009123959] [2021-06-30 12:01:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:01:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:36,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:01:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009123959] [2021-06-30 12:01:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009123959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101176238] [2021-06-30 12:01:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:37,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-30 12:01:37,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:01:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:37,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101176238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:37,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:01:37,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-30 12:01:37,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637282777] [2021-06-30 12:01:37,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-30 12:01:37,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:01:37,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-30 12:01:37,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-30 12:01:37,457 INFO L87 Difference]: Start difference. First operand 41442 states and 366253 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:01:38,909 INFO L93 Difference]: Finished difference Result 70965 states and 627044 transitions. [2021-06-30 12:01:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-30 12:01:38,910 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-30 12:01:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:01:39,344 INFO L225 Difference]: With dead ends: 70965 [2021-06-30 12:01:39,344 INFO L226 Difference]: Without dead ends: 31305 [2021-06-30 12:01:39,345 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-30 12:01:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31305 states. [2021-06-30 12:01:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31305 to 30548. [2021-06-30 12:01:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30548 states, 30547 states have (on average 8.822404818803811) internal successors, (269498), 30547 states have internal predecessors, (269498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30548 states to 30548 states and 269498 transitions. [2021-06-30 12:01:44,308 INFO L78 Accepts]: Start accepts. Automaton has 30548 states and 269498 transitions. Word has length 45 [2021-06-30 12:01:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:01:44,308 INFO L482 AbstractCegarLoop]: Abstraction has 30548 states and 269498 transitions. [2021-06-30 12:01:44,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 30548 states and 269498 transitions. [2021-06-30 12:01:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-30 12:01:44,415 INFO L496 BasicCegarLoop]: Found error trace [2021-06-30 12:01:44,415 INFO L504 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:01:44,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:44,619 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr7INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-30 12:01:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:01:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash 190854140, now seen corresponding path program 1 times [2021-06-30 12:01:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:01:44,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765372236] [2021-06-30 12:01:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:01:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:44,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:01:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765372236] [2021-06-30 12:01:44,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765372236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:44,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974693434] [2021-06-30 12:01:44,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-30 12:01:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:01:44,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-30 12:01:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-30 12:01:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:01:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974693434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-30 12:01:44,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-30 12:01:44,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-30 12:01:44,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048328467] [2021-06-30 12:01:44,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-30 12:01:44,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:01:44,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-30 12:01:44,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-30 12:01:44,867 INFO L87 Difference]: Start difference. First operand 30548 states and 269498 transitions. Second operand has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-30 12:01:46,013 INFO L93 Difference]: Finished difference Result 30547 states and 269497 transitions. [2021-06-30 12:01:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-30 12:01:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-30 12:01:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-30 12:01:46,014 INFO L225 Difference]: With dead ends: 30547 [2021-06-30 12:01:46,014 INFO L226 Difference]: Without dead ends: 0 [2021-06-30 12:01:46,015 INFO L760 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-30 12:01:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-30 12:01:46,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-30 12:01:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-30 12:01:46,015 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-06-30 12:01:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-30 12:01:46,015 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-30 12:01:46,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:01:46,015 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-30 12:01:46,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-30 12:01:46,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-30 12:01:46,218 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-30 12:01:46,220 INFO L202 PluginConnector]: Adding new model incr-decr09.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.06 12:01:46 BasicIcfg [2021-06-30 12:01:46,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-30 12:01:46,220 INFO L168 Benchmark]: Toolchain (without parser) took 106343.75 ms. Allocated memory was 177.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 158.8 MB in the beginning and 4.4 GB in the end (delta: -4.3 GB). Peak memory consumption was 3.5 GB. Max. memory is 8.0 GB. [2021-06-30 12:01:46,220 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 177.2 MB. Free memory is still 159.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-30 12:01:46,220 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.69 ms. Allocated memory is still 177.2 MB. Free memory was 158.8 MB in the beginning and 157.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-30 12:01:46,221 INFO L168 Benchmark]: Boogie Preprocessor took 15.27 ms. Allocated memory is still 177.2 MB. Free memory was 157.3 MB in the beginning and 156.3 MB in the end (delta: 944.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-30 12:01:46,221 INFO L168 Benchmark]: RCFGBuilder took 182.91 ms. Allocated memory is still 177.2 MB. Free memory was 156.2 MB in the beginning and 146.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-30 12:01:46,221 INFO L168 Benchmark]: TraceAbstraction took 106117.67 ms. Allocated memory was 177.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 146.4 MB in the beginning and 4.4 GB in the end (delta: -4.3 GB). Peak memory consumption was 3.5 GB. Max. memory is 8.0 GB. [2021-06-30 12:01:46,221 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 0.11 ms. Allocated memory is still 177.2 MB. Free memory is still 159.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.69 ms. Allocated memory is still 177.2 MB. Free memory was 158.8 MB in the beginning and 157.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.27 ms. Allocated memory is still 177.2 MB. Free memory was 157.3 MB in the beginning and 156.3 MB in the end (delta: 944.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 182.91 ms. Allocated memory is still 177.2 MB. Free memory was 156.2 MB in the beginning and 146.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 106117.67 ms. Allocated memory was 177.2 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 146.4 MB in the beginning and 4.4 GB in the end (delta: -4.3 GB). Peak memory consumption was 3.5 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 28]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 11 procedures, 62 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 105915.3ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 3567.6ms, AutomataDifference: 21956.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6457.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1174 SDtfs, 876 SDslu, 6553 SDs, 0 SdLazy, 6534 SolverSat, 720 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2760.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 412 GetRequests, 340 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 385.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67398occurred in iteration=5, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 68871.3ms AutomataMinimizationTime, 10 MinimizatonAttempts, 83488 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 529.4ms SsaConstructionTime, 295.6ms SatisfiabilityAnalysisTime, 1927.5ms InterpolantComputationTime, 700 NumberOfCodeBlocks, 700 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 682 ConstructedInterpolants, 0 QuantifiedInterpolants, 4662 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1728 ConjunctsInSsa, 200 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 9/89 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...