/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:02:12,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:02:12,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:02:12,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 20:02:12,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 20:02:12,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 20:02:12,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 20:02:12,378 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 [2021-05-21 20:02:12,403 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:02:12,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:02:12,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:02:12,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:02:12,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:02:12,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:02:12,405 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:02:12,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:02:12,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:02:12,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:02:12,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:02:12,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:02:12,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:02:12,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:02:12,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:02:12,408 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:02:12,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:02:12,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:02:12,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:02:12,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:02:12,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:02:12,651 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:02:12,652 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:02:12,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl [2021-05-21 20:02:12,653 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl' [2021-05-21 20:02:12,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:02:12,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:02:12,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:02:12,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:02:12,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:02:12,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:02:12,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:02:12,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:02:12,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:02:12,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... [2021-05-21 20:02:12,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:02:12,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:02:12,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:02:12,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:02:12,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:02:12,774 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-05-21 20:02:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-05-21 20:02:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-05-21 20:02:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:02:12,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:02:12,776 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:02:12,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:02:12,887 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 20:02:12,888 INFO L202 PluginConnector]: Adding new model fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:02:12 BoogieIcfgContainer [2021-05-21 20:02:12,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:02:12,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:02:12,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:02:12,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:02:12,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:02:12" (1/2) ... [2021-05-21 20:02:12,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b776fc1 and model type fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:02:12, skipping insertion in model container [2021-05-21 20:02:12,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:02:12" (2/2) ... [2021-05-21 20:02:12,898 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_in_loop.bpl [2021-05-21 20:02:12,905 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:02:12,905 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:02:12,905 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:02:12,906 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:02:12,937 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:12,938 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:12,938 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:12,938 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:12,940 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:12,959 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:12,965 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-05-21 20:02:12,978 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 20:02:12,990 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:02:12,990 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:02:12,990 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:02:12,990 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:02:12,990 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:02:12,990 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:02:12,990 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:02:12,990 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:02:12,996 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 25 transitions, 78 flow [2021-05-21 20:02:13,003 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 42 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-05-21 20:02:13,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:02:13,007 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-05-21 20:02:13,008 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:02:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:02:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1921556130, now seen corresponding path program 1 times [2021-05-21 20:02:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:02:13,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132873430] [2021-05-21 20:02:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:02:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:02:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:02:13,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:02:13,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132873430] [2021-05-21 20:02:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132873430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:02:13,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:02:13,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:02:13,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190465762] [2021-05-21 20:02:13,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:02:13,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:02:13,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:02:13,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:02:13,122 INFO L87 Difference]: Start difference. First operand has 42 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 41 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:02:13,176 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2021-05-21 20:02:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:02:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-05-21 20:02:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:02:13,182 INFO L225 Difference]: With dead ends: 36 [2021-05-21 20:02:13,182 INFO L226 Difference]: Without dead ends: 29 [2021-05-21 20:02:13,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:02:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-21 20:02:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-21 20:02:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-05-21 20:02:13,201 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 6 [2021-05-21 20:02:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:02:13,202 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-05-21 20:02:13,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-05-21 20:02:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-21 20:02:13,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:02:13,202 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:02:13,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:02:13,203 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:02:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:02:13,203 INFO L82 PathProgramCache]: Analyzing trace with hash 163664691, now seen corresponding path program 1 times [2021-05-21 20:02:13,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:02:13,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789959003] [2021-05-21 20:02:13,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:02:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:02:13,212 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:02:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:02:13,217 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:02:13,226 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 20:02:13,226 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 20:02:13,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:02:13,227 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-05-21 20:02:13,227 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-05-21 20:02:13,232 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,232 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,232 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,232 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,232 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,232 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,233 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,233 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,233 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,234 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,235 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,236 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 20:02:13,247 INFO L149 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2021-05-21 20:02:13,247 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 20:02:13,249 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:02:13,249 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:02:13,249 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:02:13,249 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:02:13,249 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:02:13,249 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:02:13,249 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:02:13,249 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:02:13,250 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 37 transitions, 134 flow [2021-05-21 20:02:13,277 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 604 states, 587 states have (on average 2.512776831345826) internal successors, (1475), 603 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 604 states, 587 states have (on average 2.512776831345826) internal successors, (1475), 603 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-21 20:02:13,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:02:13,279 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2021-05-21 20:02:13,279 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:02:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:02:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash -889250761, now seen corresponding path program 1 times [2021-05-21 20:02:13,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:02:13,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050553800] [2021-05-21 20:02:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:02:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:02:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:02:13,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:02:13,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050553800] [2021-05-21 20:02:13,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050553800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:02:13,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:02:13,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:02:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764311974] [2021-05-21 20:02:13,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:02:13,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:02:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:02:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:02:13,299 INFO L87 Difference]: Start difference. First operand has 604 states, 587 states have (on average 2.512776831345826) internal successors, (1475), 603 states have internal predecessors, (1475), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:02:13,323 INFO L93 Difference]: Finished difference Result 86 states and 156 transitions. [2021-05-21 20:02:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:02:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-21 20:02:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:02:13,325 INFO L225 Difference]: With dead ends: 86 [2021-05-21 20:02:13,325 INFO L226 Difference]: Without dead ends: 79 [2021-05-21 20:02:13,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:02:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-21 20:02:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-21 20:02:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.9090909090909092) internal successors, (147), 78 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 147 transitions. [2021-05-21 20:02:13,337 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 147 transitions. Word has length 9 [2021-05-21 20:02:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:02:13,337 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 147 transitions. [2021-05-21 20:02:13,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 147 transitions. [2021-05-21 20:02:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 20:02:13,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:02:13,338 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:02:13,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:02:13,338 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:02:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:02:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1271964876, now seen corresponding path program 1 times [2021-05-21 20:02:13,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:02:13,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509374678] [2021-05-21 20:02:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:02:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:02:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 20:02:13,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:02:13,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509374678] [2021-05-21 20:02:13,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509374678] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:02:13,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:02:13,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:02:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845036661] [2021-05-21 20:02:13,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:02:13,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:02:13,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:02:13,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:02:13,380 INFO L87 Difference]: Start difference. First operand 79 states and 147 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:02:13,401 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2021-05-21 20:02:13,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:02:13,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 20:02:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:02:13,402 INFO L225 Difference]: With dead ends: 61 [2021-05-21 20:02:13,402 INFO L226 Difference]: Without dead ends: 61 [2021-05-21 20:02:13,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:02:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-21 20:02:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-21 20:02:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.75) internal successors, (105), 60 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 105 transitions. [2021-05-21 20:02:13,407 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 105 transitions. Word has length 17 [2021-05-21 20:02:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:02:13,407 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 105 transitions. [2021-05-21 20:02:13,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:02:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 105 transitions. [2021-05-21 20:02:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 20:02:13,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:02:13,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:02:13,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:02:13,409 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:02:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:02:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash 994894298, now seen corresponding path program 1 times [2021-05-21 20:02:13,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:02:13,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733640592] [2021-05-21 20:02:13,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:02:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:02:13,418 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:02:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 20:02:13,424 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 20:02:13,427 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 20:02:13,427 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 20:02:13,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:02:13,430 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2021-05-21 20:02:13,438 INFO L202 PluginConnector]: Adding new model fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 08:02:13 BasicIcfg [2021-05-21 20:02:13,438 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 20:02:13,439 INFO L168 Benchmark]: Toolchain (without parser) took 753.78 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 273.5 MB in the end (delta: 44.3 MB). Peak memory consumption was 46.5 MB. Max. memory is 16.0 GB. [2021-05-21 20:02:13,439 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 337.6 MB. Free memory was 318.8 MB in the beginning and 318.7 MB in the end (delta: 69.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:02:13,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.52 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 316.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:02:13,440 INFO L168 Benchmark]: Boogie Preprocessor took 11.51 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.3 MB in the end (delta: 910.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:02:13,440 INFO L168 Benchmark]: RCFGBuilder took 169.65 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 305.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-21 20:02:13,440 INFO L168 Benchmark]: TraceAbstraction took 548.01 ms. Allocated memory is still 337.6 MB. Free memory was 305.3 MB in the beginning and 273.5 MB in the end (delta: 31.8 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.0 GB. [2021-05-21 20:02:13,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 337.6 MB. Free memory was 318.8 MB in the beginning and 318.7 MB in the end (delta: 69.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.52 ms. Allocated memory is still 337.6 MB. Free memory was 317.7 MB in the beginning and 316.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.51 ms. Allocated memory is still 337.6 MB. Free memory was 316.2 MB in the beginning and 315.3 MB in the end (delta: 910.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 169.65 ms. Allocated memory is still 337.6 MB. Free memory was 315.2 MB in the beginning and 305.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 548.01 ms. Allocated memory is still 337.6 MB. Free memory was 305.3 MB in the beginning and 273.5 MB in the end (delta: 31.8 MB). Peak memory consumption was 34.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 35]: assertion can be violated assertion can be violated We found a FailurePath: [L20] 0 x := 1; VAL [x=1] [L22] COND TRUE 0 x < 2 VAL [x=1] [L23] FORK 0 fork x foo(x); VAL [i=1, x=1] [L24] 0 x := x + 1; VAL [i=1, x=2] [L22] COND FALSE 0 !(x < 2) VAL [i=1, x=2] [L26] 0 x := 1; VAL [i=1, x=1] [L42] 1 y := 4; VAL [i=1, x=1, y=4] [L27] JOIN 1 join x; VAL [i=1, x=1, y=4] [L28] COND TRUE 0 x < 3 VAL [i=1, x=1, y=4] [L29] FORK 0 fork x foo(x); VAL [i=1, x=1, y=4] [L42] 2 y := 4; VAL [i=1, x=1, y=4] [L30] 0 x := x + 1; VAL [i=1, x=2, y=4] [L28] COND TRUE 0 x < 3 VAL [i=1, x=2, y=4] [L29] FORK 0 fork x foo(x); VAL [i=2, x=2, y=4] [L42] 3 y := 4; VAL [i=2, x=2, y=4] [L30] 0 x := x + 1; VAL [i=2, x=3, y=4] [L28] COND FALSE 0 !(x < 3) VAL [i=2, x=3, y=4] [L33] JOIN 2 join 1; VAL [i=2, x=3, y=4] [L34] JOIN 3 join 2; VAL [i=2, x=3, y=4] [L35] 0 assert false; VAL [i=2, x=3, y=4] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 238.5ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 4.7ms, AutomataDifference: 70.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 18 SDslu, 4 SDs, 0 SdLazy, 19 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.0ms SsaConstructionTime, 22.7ms SatisfiabilityAnalysisTime, 33.9ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 13 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 2/2 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 6 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 178.7ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 2.7ms, AutomataDifference: 51.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 69 SDslu, 14 SDs, 0 SdLazy, 45 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=604occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 15.3ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.2ms SsaConstructionTime, 13.0ms SatisfiabilityAnalysisTime, 42.3ms InterpolantComputationTime, 49 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 52 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 15/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...