/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/ForkInForkedProcedure01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:40:20,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:40:20,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:40:20,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 20:40:20,972 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 20:40:20,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:40:20,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:40:20,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:40:21,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:40:21,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:40:21,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:40:21,002 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:40:21,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:40:21,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:40:21,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:40:21,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:40:21,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:40:21,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:40:21,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:40:21,005 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:40:21,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:40:21,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:40:21,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:40:21,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:40:21,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:40:21,255 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:40:21,256 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:40:21,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure01.bpl [2021-03-10 20:40:21,277 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure01.bpl' [2021-03-10 20:40:21,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:40:21,308 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:40:21,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:40:21,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:40:21,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:40:21,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:40:21,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:40:21,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:40:21,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:40:21,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/1) ... [2021-03-10 20:40:21,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:40:21,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:40:21,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:40:21,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:40:21,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (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 20:40:21,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-03-10 20:40:21,388 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-03-10 20:40:21,388 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-03-10 20:40:21,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-10 20:40:21,389 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-10 20:40:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-10 20:40:21,389 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:40:21,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:40:21,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:40:21,389 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 20:40:21,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:40:21,474 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:40:21,475 INFO L202 PluginConnector]: Adding new model ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:40:21 BoogieIcfgContainer [2021-03-10 20:40:21,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:40:21,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:40:21,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:40:21,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:40:21,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:40:21" (1/2) ... [2021-03-10 20:40:21,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52257f95 and model type ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:40:21, skipping insertion in model container [2021-03-10 20:40:21,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:40:21" (2/2) ... [2021-03-10 20:40:21,494 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInForkedProcedure01.bpl [2021-03-10 20:40:21,499 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:40:21,500 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:40:21,502 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:40:21,502 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:40:21,522 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:40:21,522 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:40:21,526 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:40:21,530 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:40:21,534 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 20:40:21,550 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 20:40:21,561 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:40:21,586 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:40:21,586 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:40:21,586 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:40:21,586 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:40:21,586 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:40:21,586 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:40:21,586 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:40:21,586 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:40:21,594 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 51 flow [2021-03-10 20:40:21,605 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 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 20:40:21,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 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 20:40:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:40:21,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:40:21,610 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:40:21,611 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, fooErr0INUSE_VIOLATION, fooThread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:40:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:40:21,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1697396107, now seen corresponding path program 1 times [2021-03-10 20:40:21,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:40:21,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662553766] [2021-03-10 20:40:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:40:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:40:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:40:21,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662553766] [2021-03-10 20:40:21,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:40:21,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 20:40:21,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405384329] [2021-03-10 20:40:21,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:40:21,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:40:21,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:40:21,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:40:21,722 INFO L87 Difference]: Start difference. First operand has 37 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 36 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 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 20:40:21,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:40:21,756 INFO L93 Difference]: Finished difference Result 40 states and 61 transitions. [2021-03-10 20:40:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:40:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-03-10 20:40:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:40:21,761 INFO L225 Difference]: With dead ends: 40 [2021-03-10 20:40:21,761 INFO L226 Difference]: Without dead ends: 24 [2021-03-10 20:40:21,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:40:21,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-03-10 20:40:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-03-10 20:40:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:40:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2021-03-10 20:40:21,808 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 37 transitions. Word has length 8 [2021-03-10 20:40:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:40:21,808 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 37 transitions. [2021-03-10 20:40:21,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 20:40:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 37 transitions. [2021-03-10 20:40:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-03-10 20:40:21,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:40:21,809 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:40:21,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:40:21,809 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, fooErr0INUSE_VIOLATION, fooThread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:40:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:40:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1697488394, now seen corresponding path program 1 times [2021-03-10 20:40:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:40:21,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546283811] [2021-03-10 20:40:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:40:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:40:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 20:40:21,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546283811] [2021-03-10 20:40:21,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:40:21,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:40:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782087352] [2021-03-10 20:40:21,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:40:21,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:40:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:40:21,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:40:21,826 INFO L87 Difference]: Start difference. First operand 24 states and 37 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 20:40:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:40:21,827 INFO L93 Difference]: Finished difference Result 18 states and 27 transitions. [2021-03-10 20:40:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:40:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-03-10 20:40:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:40:21,828 INFO L225 Difference]: With dead ends: 18 [2021-03-10 20:40:21,828 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 20:40:21,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:40:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 20:40:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 20:40:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:40:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2021-03-10 20:40:21,830 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 27 transitions. Word has length 8 [2021-03-10 20:40:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:40:21,831 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 27 transitions. [2021-03-10 20:40:21,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 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 20:40:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 27 transitions. [2021-03-10 20:40:21,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 20:40:21,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:40:21,831 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:40:21,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:40:21,831 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, fooErr0INUSE_VIOLATION, fooThread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:40:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:40:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1079672062, now seen corresponding path program 1 times [2021-03-10 20:40:21,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:40:21,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294337705] [2021-03-10 20:40:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:40:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:40:21,846 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:40:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 20:40:21,852 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 20:40:21,863 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 20:40:21,863 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 20:40:21,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:40:21,872 INFO L202 PluginConnector]: Adding new model ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:40:21 BasicIcfg [2021-03-10 20:40:21,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:40:21,873 INFO L168 Benchmark]: Toolchain (without parser) took 567.33 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 214.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.0 GB. [2021-03-10 20:40:21,875 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:40:21,876 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:40:21,876 INFO L168 Benchmark]: Boogie Preprocessor took 8.05 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.8 MB in the end (delta: 740.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:40:21,877 INFO L168 Benchmark]: RCFGBuilder took 151.96 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 241.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-10 20:40:21,878 INFO L168 Benchmark]: TraceAbstraction took 382.87 ms. Allocated memory is still 255.9 MB. Free memory was 240.9 MB in the beginning and 214.3 MB in the end (delta: 26.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-03-10 20:40:21,883 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.92 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 8.05 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.8 MB in the end (delta: 740.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 151.96 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 241.5 MB in the end (delta: -7.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 382.87 ms. Allocated memory is still 255.9 MB. Free memory was 240.9 MB in the beginning and 214.3 MB in the end (delta: 26.6 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 23]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; VAL [x=0] [L18] 0 g := 0; VAL [g=0, x=0] [L20] FORK 0 fork 1 foo(x); VAL [g=0, n=0, x=0] [L29] FORK 1 fork 2 bar(n); VAL [g=0, n=0, n=0, x=0] [L36] 2 res := 23; VAL [g=0, n=0, n=0, res=23, x=0] [L21] JOIN 2 join 2; VAL [g=0, n=0, n=0, res=23, x=0] [L30] 1 g := g + 1; VAL [g=1, n=0, n=0, res=23, x=0] [L23] 0 assert g == 0; VAL [g=1, n=0, n=0, res=23, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 279.5ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 5.3ms, AutomataDifference: 53.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 9 SDslu, 10 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.5ms SsaConstructionTime, 25.5ms SatisfiabilityAnalysisTime, 45.6ms InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...