/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-POR-DelaySleep-NoLbe-Lockstep.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-b7a4f01caba76767183cf06280be652b0b124764-b7a4f01 [2021-06-07 14:11:00,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-07 14:11:00,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-07 14:11:00,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-07 14:11:00,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-07 14:11:00,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-07 14:11:00,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-07 14:11:00,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-07 14:11:00,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-07 14:11:00,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-07 14:11:00,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-07 14:11:00,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-07 14:11:00,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-07 14:11:00,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-07 14:11:00,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-07 14:11:00,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-07 14:11:00,708 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-07 14:11:00,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-07 14:11:00,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-07 14:11:00,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-07 14:11:00,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-07 14:11:00,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-07 14:11:00,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-07 14:11:00,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-07 14:11:00,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-07 14:11:00,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-07 14:11:00,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-07 14:11:00,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-07 14:11:00,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-07 14:11:00,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-07 14:11:00,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-07 14:11:00,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-07 14:11:00,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-07 14:11:00,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-07 14:11:00,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-07 14:11:00,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-07 14:11:00,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-07 14:11:00,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-07 14:11:00,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-07 14:11:00,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-07 14:11:00,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-07 14:11:00,768 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-POR-DelaySleep-NoLbe-Lockstep.epf [2021-06-07 14:11:00,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-07 14:11:00,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-07 14:11:00,795 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-07 14:11:00,795 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-07 14:11:00,797 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-07 14:11:00,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-07 14:11:00,797 INFO L138 SettingsManager]: * Use SBE=true [2021-06-07 14:11:00,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-07 14:11:00,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-07 14:11:00,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-07 14:11:00,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-07 14:11:00,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-07 14:11:00,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-07 14:11:00,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-07 14:11:00,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-07 14:11:00,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-07 14:11:00,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-07 14:11:00,800 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-07 14:11:00,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-07 14:11:00,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * DFS Order used in POR=PSEUDO_LOCKSTEP [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-07 14:11:00,801 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-07 14:11:01,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-07 14:11:01,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-07 14:11:01,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-07 14:11:01,071 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-07 14:11:01,097 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-07 14:11:01,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2021-06-07 14:11:01,098 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2021-06-07 14:11:01,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-07 14:11:01,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-07 14:11:01,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-07 14:11:01,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-07 14:11:01,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-07 14:11:01,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-07 14:11:01,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-07 14:11:01,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-07 14:11:01,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-07 14:11:01,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... [2021-06-07 14:11:01,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-07 14:11:01,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-07 14:11:01,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-07 14:11:01,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-07 14:11:01,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-07 14:11:01,300 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-07 14:11:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-07 14:11:01,300 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-07 14:11:01,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-07 14:11:01,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-07 14:11:01,301 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-07 14:11:01,429 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-07 14:11:01,429 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-07 14:11:01,431 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.06 02:11:01 BoogieIcfgContainer [2021-06-07 14:11:01,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-07 14:11:01,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-07 14:11:01,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-07 14:11:01,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-07 14:11:01,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 07.06 02:11:01" (1/2) ... [2021-06-07 14:11:01,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d86f0b5 and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.06 02:11:01, skipping insertion in model container [2021-06-07 14:11:01,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.06 02:11:01" (2/2) ... [2021-06-07 14:11:01,437 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2021-06-07 14:11:01,444 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-07 14:11:01,445 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-07 14:11:01,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-07 14:11:01,446 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-07 14:11:01,470 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-07 14:11:01,471 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-07 14:11:01,471 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-07 14:11:01,471 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-07 14:11:01,475 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-07 14:11:01,475 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-07 14:11:01,482 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-06-07 14:11:01,504 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-07 14:11:01,599 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-07 14:11:01,599 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-07 14:11:01,600 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-07 14:11:01,600 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-07 14:11:01,600 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-07 14:11:01,600 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-07 14:11:01,600 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-07 14:11:01,600 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-07 14:11:01,640 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-07 14:11:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-07 14:11:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash 207802977, now seen corresponding path program 1 times [2021-06-07 14:11:01,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-07 14:11:01,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89272960] [2021-06-07 14:11:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-07 14:11:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-07 14:11:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-07 14:11:01,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-07 14:11:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89272960] [2021-06-07 14:11:01,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89272960] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-07 14:11:01,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-07 14:11:01,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-07 14:11:01,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410341786] [2021-06-07 14:11:01,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-07 14:11:01,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-07 14:11:01,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-07 14:11:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-07 14:11:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-07 14:11:01,788 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-07 14:11:01,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-07 14:11:01,791 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-07 14:11:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-07 14:11:01,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-07 14:11:01,838 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-07 14:11:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-07 14:11:01,838 INFO L82 PathProgramCache]: Analyzing trace with hash 539347588, now seen corresponding path program 1 times [2021-06-07 14:11:01,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-07 14:11:01,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327763554] [2021-06-07 14:11:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-07 14:11:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-07 14:11:01,846 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-07 14:11:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-07 14:11:01,864 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-07 14:11:01,873 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-07 14:11:01,874 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-07 14:11:01,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-07 14:11:01,882 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-07 14:11:01,895 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.06 02:11:01 BasicIcfg [2021-06-07 14:11:01,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-07 14:11:01,896 INFO L168 Benchmark]: Toolchain (without parser) took 763.83 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 331.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.0 GB. [2021-06-07 14:11:01,897 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory is still 342.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-07 14:11:01,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.76 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-07 14:11:01,898 INFO L168 Benchmark]: Boogie Preprocessor took 40.84 ms. Allocated memory is still 362.8 MB. Free memory was 340.3 MB in the beginning and 339.5 MB in the end (delta: 862.8 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-07 14:11:01,898 INFO L168 Benchmark]: RCFGBuilder took 212.50 ms. Allocated memory is still 362.8 MB. Free memory was 339.3 MB in the beginning and 330.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-07 14:11:01,899 INFO L168 Benchmark]: TraceAbstraction took 462.82 ms. Allocated memory is still 362.8 MB. Free memory was 329.9 MB in the beginning and 331.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 633.8 kB. Max. memory is 16.0 GB. [2021-06-07 14:11:01,906 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 0.13 ms. Allocated memory is still 362.8 MB. Free memory is still 342.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.76 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 40.84 ms. Allocated memory is still 362.8 MB. Free memory was 340.3 MB in the beginning and 339.5 MB in the end (delta: 862.8 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 212.50 ms. Allocated memory is still 362.8 MB. Free memory was 339.3 MB in the beginning and 330.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 462.82 ms. Allocated memory is still 362.8 MB. Free memory was 329.9 MB in the beginning and 331.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 633.8 kB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 12, positive: 6, positive conditional: 6, positive unconditional: 0, negative: 6, negative conditional: 6, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: DistributingIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 6, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DistributingIndependenceRelation.Statistics on underlying relations: [ CachedIndependenceRelation.Independence Queries: [ total: 6, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 2, Positive cache size: 2, Positive conditional cache size: 0, Positive unconditional cache size: 2, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, SemanticConditionEliminator.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 2, Positive cache size: 2, Positive conditional cache size: 0, Positive unconditional cache size: 2, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Eliminated conditions: 0 ], Maximal queried relation: 0, Independence queries for same thread: 6 - CounterExampleResult [Line: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; VAL [res=0] [L18] 0 x := 0; VAL [res=0, x=0] [L20] COND TRUE 0 x < 3 VAL [res=0, x=0] [L21] FORK 0 fork x foo(); VAL [res=0, x=0] [L35] 1 res := y; VAL [res=0, res=2, x=0, y=2] [L22] 0 resOld := res; VAL [res=0, res=2, resOld=0, x=0, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=0, y=2] [L24] COND FALSE 0 !(x > 0) VAL [res=2, res=2, resOld=0, x=0, y=2] [L27] 0 x := x + 1; VAL [res=2, res=2, resOld=0, x=1, y=2] [L20] COND TRUE 0 x < 3 VAL [res=2, res=2, resOld=0, x=1, y=2] [L21] FORK 0 fork x foo(); VAL [res=2, resOld=0, x=1] [L35] 1 res := y; VAL [res=2, res=3, resOld=0, x=1, y=3] [L22] 0 resOld := res; VAL [res=2, res=3, resOld=2, x=1, y=3] [L23] JOIN 1 join x assign res; VAL [res=3, res=3, resOld=2, x=1, y=3] [L24] COND TRUE 0 x > 0 VAL [res=3, res=3, resOld=2, x=1, y=3] [L25] 0 assert resOld == res; VAL [res=3, res=3, resOld=2, x=1, y=3] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 344.4ms, OverallIterations: 2, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 75.9ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.2ms SsaConstructionTime, 18.1ms SatisfiabilityAnalysisTime, 55.2ms InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...