/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-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98196c323137eee61a7c1131837b356358d783d4-98196c3 [2021-06-16 16:32:57,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-16 16:32:57,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-16 16:32:57,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-16 16:32:57,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-16 16:32:57,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-16 16:32:57,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-16 16:32:57,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-16 16:32:57,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-16 16:32:57,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-16 16:32:57,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-16 16:32:57,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-16 16:32:57,434 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-Delay.epf [2021-06-16 16:32:57,470 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-16 16:32:57,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-16 16:32:57,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-16 16:32:57,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-16 16:32:57,473 INFO L138 SettingsManager]: * Use SBE=true [2021-06-16 16:32:57,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-16 16:32:57,473 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-16 16:32:57,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-16 16:32:57,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-16 16:32:57,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-16 16:32:57,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-16 16:32:57,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-16 16:32:57,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-16 16:32:57,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-16 16:32:57,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-16 16:32:57,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-16 16:32:57,475 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-16 16:32:57,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-16 16:32:57,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-16 16:32:57,476 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-16 16:32:57,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-16 16:32:57,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-16 16:32:57,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-16 16:32:57,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-16 16:32:57,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-16 16:32:57,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-16 16:32:57,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-16 16:32:57,477 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-16 16:32:57,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-16 16:32:57,477 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-06-16 16:32:57,478 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-16 16:32:57,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-16 16:32:57,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-16 16:32:57,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-16 16:32:57,837 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-16 16:32:57,838 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-16 16:32:57,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl [2021-06-16 16:32:57,840 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl' [2021-06-16 16:32:57,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-16 16:32:57,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-16 16:32:57,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-16 16:32:57,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-16 16:32:57,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-16 16:32:57,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-16 16:32:57,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-16 16:32:57,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-16 16:32:57,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-16 16:32:57,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/1) ... [2021-06-16 16:32:57,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-16 16:32:57,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-16 16:32:57,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-16 16:32:57,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-16 16:32:57,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (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 [2021-06-16 16:32:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2021-06-16 16:32:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2021-06-16 16:32:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-06-16 16:32:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2021-06-16 16:32:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-16 16:32:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-16 16:32:57,990 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-16 16:32:58,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-16 16:32:58,120 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-16 16:32:58,121 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:32:58 BoogieIcfgContainer [2021-06-16 16:32:58,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-16 16:32:58,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-16 16:32:58,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-16 16:32:58,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-16 16:32:58,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.06 04:32:57" (1/2) ... [2021-06-16 16:32:58,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5088f9c0 and model type ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.06 04:32:58, skipping insertion in model container [2021-06-16 16:32:58,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.06 04:32:58" (2/2) ... [2021-06-16 16:32:58,127 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdTest-Unsafe.bpl [2021-06-16 16:32:58,136 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-16 16:32:58,136 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-16 16:32:58,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-16 16:32:58,138 INFO L470 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-16 16:32:58,163 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,169 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,169 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,169 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,171 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,171 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,171 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,171 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,173 WARN L313 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,181 WARN L313 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-16 16:32:58,194 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-16 16:32:58,212 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-16 16:32:58,228 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-16 16:32:58,229 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-16 16:32:58,229 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-16 16:32:58,229 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-16 16:32:58,229 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-16 16:32:58,229 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-16 16:32:58,229 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-16 16:32:58,229 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-16 16:32:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 37 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) [2021-06-16 16:32:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-16 16:32:58,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:32:58,328 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:32:58,328 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:32:58,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:32:58,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1333932611, now seen corresponding path program 1 times [2021-06-16 16:32:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:32:58,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797260021] [2021-06-16 16:32:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:32:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-16 16:32:58,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:32:58,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:32:58,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:32:58,492 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-16 16:32:58,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-16 16:32:58,509 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-16 16:32:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-16 16:32:58,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-16 16:32:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797260021] [2021-06-16 16:32:58,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797260021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-16 16:32:58,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-16 16:32:58,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-16 16:32:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096609878] [2021-06-16 16:32:58,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-16 16:32:58,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-16 16:32:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-16 16:32:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:32:58,535 INFO L87 Difference]: Start difference. First operand has 38 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 37 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) 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) [2021-06-16 16:32:58,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-16 16:32:58,549 INFO L93 Difference]: Finished difference Result 26 states and 25 transitions. [2021-06-16 16:32:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-16 16:32:58,550 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 [2021-06-16 16:32:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-16 16:32:58,557 INFO L225 Difference]: With dead ends: 26 [2021-06-16 16:32:58,557 INFO L226 Difference]: Without dead ends: 20 [2021-06-16 16:32:58,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-16 16:32:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-16 16:32:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-16 16:32:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 19 states have internal predecessors, (19), 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) [2021-06-16 16:32:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-06-16 16:32:58,611 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 7 [2021-06-16 16:32:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-16 16:32:58,612 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-06-16 16:32:58,612 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) [2021-06-16 16:32:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-06-16 16:32:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-16 16:32:58,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-16 16:32:58,615 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-16 16:32:58,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-16 16:32:58,616 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-16 16:32:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-16 16:32:58,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1338455046, now seen corresponding path program 1 times [2021-06-16 16:32:58,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-16 16:32:58,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534226070] [2021-06-16 16:32:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-16 16:32:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-16 16:32:58,632 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-16 16:32:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-16 16:32:58,646 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-16 16:32:58,661 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-16 16:32:58,662 INFO L573 BasicCegarLoop]: Counterexample might be feasible [2021-06-16 16:32:58,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-16 16:32:58,666 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-16 16:32:58,676 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.06 04:32:58 BasicIcfg [2021-06-16 16:32:58,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-16 16:32:58,678 INFO L168 Benchmark]: Toolchain (without parser) took 807.41 ms. Allocated memory is still 210.8 MB. Free memory was 190.5 MB in the beginning and 190.7 MB in the end (delta: -206.4 kB). Peak memory consumption was 195.2 kB. Max. memory is 8.0 GB. [2021-06-16 16:32:58,679 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.58 ms. Allocated memory is still 210.8 MB. Free memory is still 191.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-16 16:32:58,680 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.79 ms. Allocated memory is still 210.8 MB. Free memory was 190.4 MB in the beginning and 189.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:32:58,681 INFO L168 Benchmark]: Boogie Preprocessor took 11.60 ms. Allocated memory is still 210.8 MB. Free memory was 189.0 MB in the beginning and 188.1 MB in the end (delta: 857.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-16 16:32:58,682 INFO L168 Benchmark]: RCFGBuilder took 218.28 ms. Allocated memory is still 210.8 MB. Free memory was 188.1 MB in the beginning and 179.7 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-06-16 16:32:58,683 INFO L168 Benchmark]: TraceAbstraction took 553.15 ms. Allocated memory is still 210.8 MB. Free memory was 179.3 MB in the beginning and 190.7 MB in the end (delta: -11.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-16 16:32:58,691 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 0.58 ms. Allocated memory is still 210.8 MB. Free memory is still 191.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.79 ms. Allocated memory is still 210.8 MB. Free memory was 190.4 MB in the beginning and 189.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.60 ms. Allocated memory is still 210.8 MB. Free memory was 189.0 MB in the beginning and 188.1 MB in the end (delta: 857.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 218.28 ms. Allocated memory is still 210.8 MB. Free memory was 188.1 MB in the beginning and 179.7 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 553.15 ms. Allocated memory is still 210.8 MB. Free memory was 179.3 MB in the beginning and 190.7 MB in the end (delta: -11.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 29, positive: 22, positive conditional: 22, positive unconditional: 0, negative: 7, negative conditional: 7, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 23, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 23, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 23, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 23, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 23, unknown conditional: 0, unknown unconditional: 23] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 22, Positive conditional cache size: 0, Positive unconditional cache size: 22, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Independence queries for same thread: 6 - 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 for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 437.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 16.2ms, AutomataDifference: 35.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.0ms, PartialOrderReductionTime: 74.5ms, 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, 13.7ms 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: 33.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.7ms SsaConstructionTime, 26.4ms SatisfiabilityAnalysisTime, 87.0ms 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...