/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-PN-RepeatedSemanticLbeWithPredicates.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-26 03:33:39,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-26 03:33:39,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-26 03:33:40,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-26 03:33:40,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-26 03:33:40,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-26 03:33:40,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-26 03:33:40,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-26 03:33:40,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-26 03:33:40,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-26 03:33:40,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-26 03:33:40,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-26 03:33:40,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-26 03:33:40,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-26 03:33:40,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-26 03:33:40,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-26 03:33:40,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-26 03:33:40,067 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-PN-RepeatedSemanticLbeWithPredicates.epf [2021-03-26 03:33:40,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-26 03:33:40,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-26 03:33:40,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-26 03:33:40,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-26 03:33:40,104 INFO L138 SettingsManager]: * Use SBE=true [2021-03-26 03:33:40,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-26 03:33:40,104 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-26 03:33:40,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-26 03:33:40,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-26 03:33:40,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-26 03:33:40,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-26 03:33:40,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-26 03:33:40,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-26 03:33:40,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-26 03:33:40,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-26 03:33:40,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-26 03:33:40,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-26 03:33:40,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-26 03:33:40,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-26 03:33:40,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-26 03:33:40,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-26 03:33:40,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-26 03:33:40,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-26 03:33:40,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-26 03:33:40,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-26 03:33:40,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-26 03:33:40,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-26 03:33:40,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=SEMANTIC_BASED_MOVER_CHECK_WITH_PREDICATES [2021-03-26 03:33:40,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-26 03:33:40,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-26 03:33:40,109 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-26 03:33:40,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-26 03:33:40,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-26 03:33:40,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-26 03:33:40,449 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-26 03:33:40,450 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-26 03:33:40,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure02.bpl [2021-03-26 03:33:40,451 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure02.bpl' [2021-03-26 03:33:40,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-26 03:33:40,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-26 03:33:40,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-26 03:33:40,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-26 03:33:40,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-26 03:33:40,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,516 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-26 03:33:40,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-26 03:33:40,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-26 03:33:40,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-26 03:33:40,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/1) ... [2021-03-26 03:33:40,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-26 03:33:40,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-26 03:33:40,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-26 03:33:40,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-26 03:33:40,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (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 [2021-03-26 03:33:40,586 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-03-26 03:33:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-03-26 03:33:40,586 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-03-26 03:33:40,586 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-26 03:33:40,586 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-26 03:33:40,586 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-26 03:33:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2021-03-26 03:33:40,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-26 03:33:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-26 03:33:40,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-26 03:33:40,588 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-26 03:33:40,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-26 03:33:40,684 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-26 03:33:40,687 INFO L202 PluginConnector]: Adding new model ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.03 03:33:40 BoogieIcfgContainer [2021-03-26 03:33:40,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-26 03:33:40,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-26 03:33:40,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-26 03:33:40,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-26 03:33:40,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.03 03:33:40" (1/2) ... [2021-03-26 03:33:40,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42df338d and model type ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.03 03:33:40, skipping insertion in model container [2021-03-26 03:33:40,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.03 03:33:40" (2/2) ... [2021-03-26 03:33:40,707 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInForkedProcedure02.bpl [2021-03-26 03:33:40,715 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-26 03:33:40,718 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-26 03:33:40,719 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-26 03:33:40,739 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,740 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,740 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,740 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,745 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,749 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,753 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-26 03:33:40,756 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-26 03:33:40,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-26 03:33:40,785 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-26 03:33:40,785 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-26 03:33:40,785 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-26 03:33:40,786 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-26 03:33:40,786 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-26 03:33:40,786 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-26 03:33:40,786 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-26 03:33:40,786 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-26 03:33:40,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 13 transitions, 36 flow [2021-03-26 03:33:40,804 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-26 03:33:40,804 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-26 03:33:40,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-26 03:33:40,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 13 transitions, 36 flow [2021-03-26 03:33:40,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 15 places, 8 transitions, 22 flow [2021-03-26 03:33:40,809 INFO L170 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-03-26 03:33:40,819 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 8 transitions, 22 flow [2021-03-26 03:33:40,821 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 8 transitions, 22 flow [2021-03-26 03:33:40,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 8 transitions, 22 flow [2021-03-26 03:33:40,825 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-26 03:33:40,825 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-26 03:33:40,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 8 events. 0/8 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 0/8 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-26 03:33:40,826 INFO L142 LiptonReduction]: Number of co-enabled transitions 12 [2021-03-26 03:33:40,863 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-26 03:33:40,864 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-26 03:33:40,865 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 57 [2021-03-26 03:33:40,872 INFO L129 PetriNetUnfolder]: 0/4 cut-off events. [2021-03-26 03:33:40,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-26 03:33:40,872 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-26 03:33:40,872 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-26 03:33:40,873 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT]=== [2021-03-26 03:33:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-26 03:33:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1998034, now seen corresponding path program 1 times [2021-03-26 03:33:40,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-26 03:33:40,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448612956] [2021-03-26 03:33:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-26 03:33:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-26 03:33:40,985 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-26 03:33:40,988 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-26 03:33:41,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-26 03:33:41,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-26 03:33:41,043 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-26 03:33:41,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-26 03:33:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-26 03:33:41,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448612956] [2021-03-26 03:33:41,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-26 03:33:41,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-26 03:33:41,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036650401] [2021-03-26 03:33:41,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-26 03:33:41,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-26 03:33:41,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-26 03:33:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-26 03:33:41,070 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 15 [2021-03-26 03:33:41,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 6 transitions, 18 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2021-03-26 03:33:41,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-26 03:33:41,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 15 [2021-03-26 03:33:41,072 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-26 03:33:41,106 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-03-26 03:33:41,107 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-26 03:33:41,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 5 events. 0/5 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 1/6 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-26 03:33:41,108 INFO L132 encePairwiseOnDemand]: 11/15 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2021-03-26 03:33:41,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 5 transitions, 22 flow [2021-03-26 03:33:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-26 03:33:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-26 03:33:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 49 transitions. [2021-03-26 03:33:41,115 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2021-03-26 03:33:41,115 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 49 transitions. [2021-03-26 03:33:41,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 49 transitions. [2021-03-26 03:33:41,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-26 03:33:41,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 49 transitions. [2021-03-26 03:33:41,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2021-03-26 03:33:41,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-03-26 03:33:41,121 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2021-03-26 03:33:41,122 INFO L185 Difference]: Start difference. First operand has 13 places, 6 transitions, 18 flow. Second operand 5 states and 49 transitions. [2021-03-26 03:33:41,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 5 transitions, 22 flow [2021-03-26 03:33:41,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 5 transitions, 20 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-26 03:33:41,125 INFO L241 Difference]: Finished difference. Result has 14 places, 0 transitions, 0 flow [2021-03-26 03:33:41,127 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=14, PETRI_TRANSITIONS=0} [2021-03-26 03:33:41,127 INFO L343 CegarLoopForPetriNet]: 13 programPoint places, 1 predicate places. [2021-03-26 03:33:41,127 INFO L170 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-03-26 03:33:41,128 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 0 transitions, 0 flow [2021-03-26 03:33:41,128 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 0 transitions, 0 flow [2021-03-26 03:33:41,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-26 03:33:41,128 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-26 03:33:41,128 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-26 03:33:41,129 INFO L84 FinitePrefix]: Finished finitePrefix Result has 0 conditions, 0 events. 0/0 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 0. Compared 0 event pairs, 0 based on Foata normal form. 0/0 useless extension candidates. Maximal degree in co-relation 0. Up to 0 conditions per place. [2021-03-26 03:33:41,129 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-26 03:33:41,129 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-26 03:33:41,129 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-26 03:33:41,129 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-26 03:33:41,130 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-26 03:33:41,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 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) [2021-03-26 03:33:41,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-26 03:33:41,133 INFO L202 PluginConnector]: Adding new model ForkInForkedProcedure02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.03 03:33:41 BasicIcfg [2021-03-26 03:33:41,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-26 03:33:41,134 INFO L168 Benchmark]: Toolchain (without parser) took 647.52 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 206.9 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.0 GB. [2021-03-26 03:33:41,135 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.43 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-26 03:33:41,135 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-26 03:33:41,136 INFO L168 Benchmark]: Boogie Preprocessor took 12.89 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 837.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-26 03:33:41,137 INFO L168 Benchmark]: RCFGBuilder took 157.18 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 226.0 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-26 03:33:41,137 INFO L168 Benchmark]: TraceAbstraction took 443.79 ms. Allocated memory is still 255.9 MB. Free memory was 225.6 MB in the beginning and 206.9 MB in the end (delta: 18.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.0 GB. [2021-03-26 03:33:41,139 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 0.43 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.55 ms. Allocated memory is still 255.9 MB. Free memory was 236.7 MB in the beginning and 235.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.89 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 837.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 157.18 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 226.0 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 443.79 ms. Allocated memory is still 255.9 MB. Free memory was 225.6 MB in the beginning and 206.9 MB in the end (delta: 18.7 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 42.5ms, 15 PlacesBefore, 13 PlacesAfterwards, 8 TransitionsBefore, 6 TransitionsAfterwards, 12 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 2, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , 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: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 2, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.9ms, 14 PlacesBefore, 0 PlacesAfterwards, 0 TransitionsBefore, 0 TransitionsAfterwards, 0 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 0 TotalNumberOfCompositions, 0 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.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] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.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.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 35]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 349.3ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 61.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 83.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 3 SDslu, 2 SDs, 0 SdLazy, 3 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.6ms SsaConstructionTime, 14.5ms SatisfiabilityAnalysisTime, 109.9ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...