/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 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:41:11,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:41:11,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:41:11,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:41:11,431 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 [2021-03-10 20:41:11,457 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:41:11,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:41:11,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:41:11,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:41:11,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:41:11,460 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:41:11,460 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:41:11,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:41:11,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:41:11,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:41:11,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:41:11,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:41:11,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:41:11,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:41:11,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:41:11,464 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:41:11,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:41:11,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:41:11,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:41:11,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:41:11,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:41:11,703 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:41:11,705 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:41:11,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl [2021-03-10 20:41:11,706 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_in_loop.bpl' [2021-03-10 20:41:11,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:41:11,737 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:41:11,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:11,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:41:11,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:41:11,745 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 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,749 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 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,753 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:11,754 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:41:11,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:41:11,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:41:11,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/1) ... [2021-03-10 20:41:11,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:41:11,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:41:11,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:41:11,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:41:11,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (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 [2021-03-10 20:41:11,810 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-10 20:41:11,810 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-10 20:41:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-10 20:41:11,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:41:11,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:41:11,811 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 20:41:11,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:41:11,929 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:41:11,930 INFO L202 PluginConnector]: Adding new model fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:11 BoogieIcfgContainer [2021-03-10 20:41:11,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:41:11,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:41:11,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:41:11,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:41:11,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:11" (1/2) ... [2021-03-10 20:41:11,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@805d20 and model type fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:41:11, skipping insertion in model container [2021-03-10 20:41:11,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:11" (2/2) ... [2021-03-10 20:41:11,937 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_in_loop.bpl [2021-03-10 20:41:11,942 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:41:11,942 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:41:11,944 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:41:11,945 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:41:11,966 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:11,966 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:11,967 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:11,968 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:11,970 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:11,984 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:11,997 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-03-10 20:41:12,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:41:12,033 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:41:12,033 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:41:12,033 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:41:12,033 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:41:12,033 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:41:12,033 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:41:12,033 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:41:12,033 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:41:12,041 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 25 transitions, 78 flow [2021-03-10 20:41:12,050 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) [2021-03-10 20:41:12,051 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) [2021-03-10 20:41:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-10 20:41:12,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:12,055 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-03-10 20:41:12,055 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1921556130, now seen corresponding path program 1 times [2021-03-10 20:41:12,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:12,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793127160] [2021-03-10 20:41:12,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:41:12,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793127160] [2021-03-10 20:41:12,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:12,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:12,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707314376] [2021-03-10 20:41:12,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:12,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:12,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:12,194 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) [2021-03-10 20:41:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:12,231 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2021-03-10 20:41:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:12,232 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 [2021-03-10 20:41:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:12,237 INFO L225 Difference]: With dead ends: 36 [2021-03-10 20:41:12,238 INFO L226 Difference]: Without dead ends: 29 [2021-03-10 20:41:12,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-03-10 20:41:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-03-10 20:41:12,255 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) [2021-03-10 20:41:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-03-10 20:41:12,256 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 6 [2021-03-10 20:41:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:12,257 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-03-10 20:41:12,257 INFO L481 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) [2021-03-10 20:41:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-03-10 20:41:12,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 20:41:12,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:12,257 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:12,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:41:12,258 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:12,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:12,258 INFO L82 PathProgramCache]: Analyzing trace with hash 163664691, now seen corresponding path program 1 times [2021-03-10 20:41:12,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:12,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111491800] [2021-03-10 20:41:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:41:12,266 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:41:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:41:12,271 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:41:12,279 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:41:12,279 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:41:12,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:41:12,280 WARN L342 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-03-10 20:41:12,280 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-03-10 20:41:12,286 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,286 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,286 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,286 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,286 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,286 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,287 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,287 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,287 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,288 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,289 WARN L313 ript$VariableManager]: TermVariabe fooThread1of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,290 WARN L313 ript$VariableManager]: TermVariabe fooThread2of2ForFork1_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:41:12,297 INFO L149 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2021-03-10 20:41:12,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 20:41:12,299 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:41:12,299 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:41:12,299 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:41:12,299 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:41:12,299 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:41:12,299 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:41:12,299 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:41:12,299 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:41:12,300 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 37 transitions, 134 flow [2021-03-10 20:41:12,328 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) [2021-03-10 20:41:12,329 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) [2021-03-10 20:41:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 20:41:12,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:12,330 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2021-03-10 20:41:12,330 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:12,330 INFO L82 PathProgramCache]: Analyzing trace with hash -889250761, now seen corresponding path program 1 times [2021-03-10 20:41:12,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:12,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100948727] [2021-03-10 20:41:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:41:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100948727] [2021-03-10 20:41:12,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:12,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125638304] [2021-03-10 20:41:12,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:12,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:12,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:12,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:12,348 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) [2021-03-10 20:41:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:12,370 INFO L93 Difference]: Finished difference Result 86 states and 156 transitions. [2021-03-10 20:41:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:12,371 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 [2021-03-10 20:41:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:12,372 INFO L225 Difference]: With dead ends: 86 [2021-03-10 20:41:12,372 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 20:41:12,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 20:41:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-03-10 20:41:12,378 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) [2021-03-10 20:41:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 147 transitions. [2021-03-10 20:41:12,379 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 147 transitions. Word has length 9 [2021-03-10 20:41:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:12,379 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 147 transitions. [2021-03-10 20:41:12,379 INFO L481 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) [2021-03-10 20:41:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 147 transitions. [2021-03-10 20:41:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 20:41:12,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:12,380 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:12,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:41:12,380 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1271964876, now seen corresponding path program 1 times [2021-03-10 20:41:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:12,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874995132] [2021-03-10 20:41:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 20:41:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874995132] [2021-03-10 20:41:12,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:12,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 20:41:12,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828507970] [2021-03-10 20:41:12,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 20:41:12,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 20:41:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:41:12,415 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) [2021-03-10 20:41:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:12,434 INFO L93 Difference]: Finished difference Result 61 states and 105 transitions. [2021-03-10 20:41:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 20:41:12,434 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 [2021-03-10 20:41:12,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:12,435 INFO L225 Difference]: With dead ends: 61 [2021-03-10 20:41:12,435 INFO L226 Difference]: Without dead ends: 61 [2021-03-10 20:41:12,436 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 20:41:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-03-10 20:41:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-03-10 20:41:12,439 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) [2021-03-10 20:41:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 105 transitions. [2021-03-10 20:41:12,440 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 105 transitions. Word has length 17 [2021-03-10 20:41:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:12,440 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 105 transitions. [2021-03-10 20:41:12,440 INFO L481 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) [2021-03-10 20:41:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 105 transitions. [2021-03-10 20:41:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 20:41:12,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:12,441 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:12,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:41:12,451 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:12,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:12,452 INFO L82 PathProgramCache]: Analyzing trace with hash 994894298, now seen corresponding path program 1 times [2021-03-10 20:41:12,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:12,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723814698] [2021-03-10 20:41:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:41:12,458 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:41:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:41:12,464 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:41:12,466 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:41:12,466 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:41:12,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:41:12,483 INFO L202 PluginConnector]: Adding new model fork_in_loop.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:41:12 BasicIcfg [2021-03-10 20:41:12,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:41:12,484 INFO L168 Benchmark]: Toolchain (without parser) took 749.37 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 236.6 MB in the beginning and 337.1 MB in the end (delta: -100.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:12,485 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:12,487 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.16 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:12,487 INFO L168 Benchmark]: Boogie Preprocessor took 10.92 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 898.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:12,487 INFO L168 Benchmark]: RCFGBuilder took 164.21 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 240.4 MB in the end (delta: -6.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:12,488 INFO L168 Benchmark]: TraceAbstraction took 551.43 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 240.0 MB in the beginning and 337.1 MB in the end (delta: -97.1 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:12,489 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.16 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.92 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 898.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 164.21 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 240.4 MB in the end (delta: -6.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 551.43 ms. Allocated memory was 255.9 MB in the beginning and 356.5 MB in the end (delta: 100.7 MB). Free memory was 240.0 MB in the beginning and 337.1 MB in the end (delta: -97.1 MB). Peak memory consumption was 3.5 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 CFG has 2 procedures, 18 locations, 1 error locations. Started 2 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 416.9ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 7.1ms, AutomataDifference: 101.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 51 SDtfs, 87 SDslu, 18 SDs, 0 SdLazy, 64 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=604occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20.3ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.7ms SsaConstructionTime, 29.8ms SatisfiabilityAnalysisTime, 100.4ms InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 65 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 17/17 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...