/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 14:15:35,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 14:15:35,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 14:15:35,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 14:15:35,199 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-SemanticLbe.epf [2021-03-11 14:15:35,230 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 14:15:35,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 14:15:35,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 14:15:35,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 14:15:35,233 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 14:15:35,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 14:15:35,233 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 14:15:35,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 14:15:35,234 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 14:15:35,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 14:15:35,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 14:15:35,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 14:15:35,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 14:15:35,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:15:35,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 14:15:35,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 14:15:35,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 14:15:35,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 14:15:35,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 14:15:35,503 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 14:15:35,504 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 14:15:35,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl [2021-03-11 14:15:35,504 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl' [2021-03-11 14:15:35,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 14:15:35,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 14:15:35,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 14:15:35,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 14:15:35,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 14:15:35,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,555 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 14:15:35,560 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 14:15:35,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 14:15:35,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 14:15:35,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... [2021-03-11 14:15:35,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 14:15:35,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 14:15:35,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 14:15:35,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 14:15:35,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 14:15:35,614 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-03-11 14:15:35,614 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-03-11 14:15:35,614 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-03-11 14:15:35,615 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-11 14:15:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-11 14:15:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-11 14:15:35,615 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 14:15:35,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 14:15:35,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 14:15:35,616 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 14:15:35,718 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 14:15:35,718 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 14:15:35,719 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:15:35 BoogieIcfgContainer [2021-03-11 14:15:35,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 14:15:35,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 14:15:35,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 14:15:35,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 14:15:35,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 02:15:35" (1/2) ... [2021-03-11 14:15:35,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33962caa and model type JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 02:15:35, skipping insertion in model container [2021-03-11 14:15:35,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 02:15:35" (2/2) ... [2021-03-11 14:15:35,726 INFO L111 eAbstractionObserver]: Analyzing ICFG JoinTheForkingThread.bpl [2021-03-11 14:15:35,732 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 14:15:35,732 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 14:15:35,735 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-11 14:15:35,735 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 14:15:35,759 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,760 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,762 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,762 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,765 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,766 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,766 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,780 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,782 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,782 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,782 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 14:15:35,818 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-11 14:15:35,829 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 14:15:35,842 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 14:15:35,842 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 14:15:35,842 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 14:15:35,842 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 14:15:35,842 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 14:15:35,843 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 14:15:35,843 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 14:15:35,843 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 14:15:35,850 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 14:15:35,857 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 25 transitions, 78 flow [2021-03-11 14:15:35,859 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 25 transitions, 78 flow [2021-03-11 14:15:35,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 78 flow [2021-03-11 14:15:35,881 INFO L129 PetriNetUnfolder]: 1/21 cut-off events. [2021-03-11 14:15:35,881 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 14:15:35,883 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 21 events. 1/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 10. Up to 3 conditions per place. [2021-03-11 14:15:35,884 INFO L116 LiptonReduction]: Number of co-enabled transitions 14 [2021-03-11 14:15:36,009 INFO L131 LiptonReduction]: Checked pairs total: 55 [2021-03-11 14:15:36,010 INFO L133 LiptonReduction]: Total number of compositions: 6 [2021-03-11 14:15:36,016 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 19 transitions, 66 flow [2021-03-11 14:15:36,021 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:15:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:15:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-03-11 14:15:36,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:15:36,031 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 14:15:36,032 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:15:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:15:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1733536440, now seen corresponding path program 1 times [2021-03-11 14:15:36,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:15:36,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85616293] [2021-03-11 14:15:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:15:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 14:15:36,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:36,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:15:36,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:36,132 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 14:15:36,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 14:15:36,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 14:15:36,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 14:15:36,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85616293] [2021-03-11 14:15:36,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 14:15:36,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 14:15:36,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723132069] [2021-03-11 14:15:36,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 14:15:36,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 14:15:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 14:15:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:15:36,158 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 18 states have internal predecessors, (23), 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:15:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 14:15:36,171 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-03-11 14:15:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 14:15:36,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-03-11 14:15:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 14:15:36,186 INFO L225 Difference]: With dead ends: 9 [2021-03-11 14:15:36,189 INFO L226 Difference]: Without dead ends: 9 [2021-03-11 14:15:36,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 14:15:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-03-11 14:15:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-03-11 14:15:36,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:15:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-03-11 14:15:36,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-03-11 14:15:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 14:15:36,206 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-03-11 14:15:36,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 14:15:36,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-03-11 14:15:36,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-03-11 14:15:36,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 14:15:36,207 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 14:15:36,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 14:15:36,207 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 14:15:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 14:15:36,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2094090882, now seen corresponding path program 1 times [2021-03-11 14:15:36,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 14:15:36,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359030124] [2021-03-11 14:15:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 14:15:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:15:36,214 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:15:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 14:15:36,218 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 14:15:36,230 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 14:15:36,231 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 14:15:36,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 14:15:36,241 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 02:15:36 BasicIcfg [2021-03-11 14:15:36,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 14:15:36,243 INFO L168 Benchmark]: Toolchain (without parser) took 704.42 ms. Allocated memory is still 335.5 MB. Free memory was 315.6 MB in the beginning and 291.8 MB in the end (delta: 23.8 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:36,244 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 335.5 MB. Free memory was 316.6 MB in the beginning and 316.5 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:36,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.07 ms. Allocated memory is still 335.5 MB. Free memory was 315.1 MB in the beginning and 313.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 14:15:36,246 INFO L168 Benchmark]: Boogie Preprocessor took 10.81 ms. Allocated memory is still 335.5 MB. Free memory was 313.6 MB in the beginning and 312.7 MB in the end (delta: 875.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:36,247 INFO L168 Benchmark]: RCFGBuilder took 148.13 ms. Allocated memory is still 335.5 MB. Free memory was 312.7 MB in the beginning and 303.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:36,248 INFO L168 Benchmark]: TraceAbstraction took 520.86 ms. Allocated memory is still 335.5 MB. Free memory was 303.5 MB in the beginning and 291.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.0 GB. [2021-03-11 14:15:36,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 335.5 MB. Free memory was 316.6 MB in the beginning and 316.5 MB in the end (delta: 71.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.07 ms. Allocated memory is still 335.5 MB. Free memory was 315.1 MB in the beginning and 313.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.81 ms. Allocated memory is still 335.5 MB. Free memory was 313.6 MB in the beginning and 312.7 MB in the end (delta: 875.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 148.13 ms. Allocated memory is still 335.5 MB. Free memory was 312.7 MB in the beginning and 303.9 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 520.86 ms. Allocated memory is still 335.5 MB. Free memory was 303.5 MB in the beginning and 291.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 150.9ms, 29 PlacesBefore, 23 PlacesAfterwards, 25 TransitionsBefore, 19 TransitionsAfterwards, 14 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 55 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 55, positive: 55, positive conditional: 0, positive unconditional: 55, 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: 11, positive: 11, positive conditional: 0, positive unconditional: 11, 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: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , 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: 55, positive: 44, positive conditional: 0, positive unconditional: 44, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11, unknown conditional: 0, unknown unconditional: 11] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - CounterExampleResult [Line: 45]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; [L18] 0 g := 0; VAL [g=0, x=0] [L20] FORK 0 fork 1 foo(x); VAL [g=0, n=0, x=0] [L29] FORK 1 fork 2 bar(n); VAL [g=0, n=0, n=0, x=0] [L40] 2 res := 23; VAL [g=0, n=0, n=0, res=23, x=0] [L30] 1 g := g + 1; [L31] 1 res := 23; [L44] JOIN 1 join nondet assign localVar; VAL [g=1, localVar=23, n=0, n=0, nondet=1, res=23, res=23, x=0] [L45] 2 assert false; VAL [g=1, localVar=23, n=0, n=0, nondet=1, res=23, res=23, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 391.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 9.4ms, AutomataDifference: 42.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 178.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6 SDtfs, 3 SDslu, 1 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 8.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.3ms SsaConstructionTime, 17.5ms SatisfiabilityAnalysisTime, 39.6ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 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...