/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 18:42:08,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 18:42:08,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 18:42:08,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 18:42:08,251 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 [2021-08-12 18:42:08,265 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 18:42:08,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 18:42:08,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 18:42:08,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 18:42:08,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 18:42:08,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 18:42:08,266 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 18:42:08,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 18:42:08,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 18:42:08,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 18:42:08,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 18:42:08,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 18:42:08,269 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 18:42:08,269 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 18:42:08,269 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 18:42:08,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 18:42:08,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 18:42:08,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 18:42:08,480 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 18:42:08,481 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 18:42:08,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl [2021-08-12 18:42:08,482 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl' [2021-08-12 18:42:08,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 18:42:08,503 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 18:42:08,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 18:42:08,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 18:42:08,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 18:42:08,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 18:42:08,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 18:42:08,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 18:42:08,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 18:42:08,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/1) ... [2021-08-12 18:42:08,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 18:42:08,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 18:42:08,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 18:42:08,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 18:42:08,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (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 [2021-08-12 18:42:08,570 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-08-12 18:42:08,571 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-08-12 18:42:08,571 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-08-12 18:42:08,571 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-08-12 18:42:08,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 18:42:08,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 18:42:08,572 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 18:42:08,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 18:42:08,656 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 18:42:08,657 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:42:08 BoogieIcfgContainer [2021-08-12 18:42:08,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 18:42:08,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 18:42:08,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 18:42:08,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 18:42:08,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 06:42:08" (1/2) ... [2021-08-12 18:42:08,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36374a6 and model type ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 06:42:08, skipping insertion in model container [2021-08-12 18:42:08,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 06:42:08" (2/2) ... [2021-08-12 18:42:08,662 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdTest-Unsafe.bpl [2021-08-12 18:42:08,665 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 18:42:08,665 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 18:42:08,666 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 18:42:08,678 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,678 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,679 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,679 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,679 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,679 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,679 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,679 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,681 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,684 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 18:42:08,688 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 18:42:08,701 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 18:42:08,714 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 18:42:08,714 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 18:42:08,714 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 18:42:08,714 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 18:42:08,714 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 18:42:08,714 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 18:42:08,714 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 18:42:08,715 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 18:42:08,720 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 14 transitions, 44 flow [2021-08-12 18:42:08,728 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 37 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) [2021-08-12 18:42:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 37 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) [2021-08-12 18:42:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:42:08,734 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:42:08,734 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:42:08,735 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:42:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:42:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1333932611, now seen corresponding path program 1 times [2021-08-12 18:42:08,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:42:08,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335084334] [2021-08-12 18:42:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:42:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 18:42:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 18:42:08,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 18:42:08,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335084334] [2021-08-12 18:42:08,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335084334] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 18:42:08,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 18:42:08,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 18:42:08,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661291890] [2021-08-12 18:42:08,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 18:42:08,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 18:42:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 18:42:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:42:08,848 INFO L87 Difference]: Start difference. First operand has 38 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 37 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, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-08-12 18:42:08,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 18:42:08,860 INFO L93 Difference]: Finished difference Result 38 states and 59 transitions. [2021-08-12 18:42:08,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 18:42:08,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-08-12 18:42:08,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 18:42:08,866 INFO L225 Difference]: With dead ends: 38 [2021-08-12 18:42:08,866 INFO L226 Difference]: Without dead ends: 20 [2021-08-12 18:42:08,868 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 18:42:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-12 18:42:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-12 18:42:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 18:42:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2021-08-12 18:42:08,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2021-08-12 18:42:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 18:42:08,890 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2021-08-12 18:42:08,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-08-12 18:42:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2021-08-12 18:42:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-12 18:42:08,892 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 18:42:08,892 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-12 18:42:08,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 18:42:08,892 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 18:42:08,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 18:42:08,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1338455046, now seen corresponding path program 1 times [2021-08-12 18:42:08,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 18:42:08,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918644904] [2021-08-12 18:42:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 18:42:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:42:08,911 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:42:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-12 18:42:08,922 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-12 18:42:08,942 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-12 18:42:08,942 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-12 18:42:08,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 18:42:08,945 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 18:42:08,952 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 06:42:08 BasicIcfg [2021-08-12 18:42:08,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 18:42:08,953 INFO L168 Benchmark]: Toolchain (without parser) took 449.67 ms. Allocated memory is still 176.2 MB. Free memory was 156.2 MB in the beginning and 158.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. [2021-08-12 18:42:08,954 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 176.2 MB. Free memory was 157.3 MB in the beginning and 157.2 MB in the end (delta: 88.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 18:42:08,956 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.44 ms. Allocated memory is still 176.2 MB. Free memory was 156.2 MB in the beginning and 154.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 18:42:08,956 INFO L168 Benchmark]: Boogie Preprocessor took 7.84 ms. Allocated memory is still 176.2 MB. Free memory was 154.7 MB in the beginning and 153.9 MB in the end (delta: 777.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 18:42:08,956 INFO L168 Benchmark]: RCFGBuilder took 127.84 ms. Allocated memory is still 176.2 MB. Free memory was 153.8 MB in the beginning and 145.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-08-12 18:42:08,957 INFO L168 Benchmark]: TraceAbstraction took 294.27 ms. Allocated memory is still 176.2 MB. Free memory was 144.8 MB in the beginning and 158.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 8.0 GB. [2021-08-12 18:42:08,963 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 176.2 MB. Free memory was 157.3 MB in the beginning and 157.2 MB in the end (delta: 88.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 16.44 ms. Allocated memory is still 176.2 MB. Free memory was 156.2 MB in the beginning and 154.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 7.84 ms. Allocated memory is still 176.2 MB. Free memory was 154.7 MB in the beginning and 153.9 MB in the end (delta: 777.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 127.84 ms. Allocated memory is still 176.2 MB. Free memory was 153.8 MB in the beginning and 145.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 294.27 ms. Allocated memory is still 176.2 MB. Free memory was 144.8 MB in the beginning and 158.6 MB in the end (delta: -13.8 MB). Peak memory consumption was 26.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 22]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; VAL [x=0] [L19] FORK 0 fork 1 increment(x); VAL [n=0, x=0] [L20] FORK 0 fork 2 decrement(x); VAL [n=0, n=0, x=0] [L37] 2 res := n - 1; VAL [n=0, n=0, res=-1, x=0] [L21] JOIN 2 join 2 assign y; VAL [n=0, n=0, res=-1, x=0, y=-1] [L22] 0 assert y == 1; VAL [n=0, n=0, res=-1, x=0, y=-1] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 230.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.1ms, AutomataDifference: 42.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 6 SDslu, 1 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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: 13.4ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.7ms SsaConstructionTime, 18.5ms SatisfiabilityAnalysisTime, 32.0ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 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...