/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/ForkInForkedProcedure01.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-6f4246e9f5583d222ebb38ff8175c901f3a528f0-6f4246e [2021-04-29 03:54:12,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-29 03:54:12,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-29 03:54:12,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-29 03:54:12,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-29 03:54:12,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-29 03:54:12,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-29 03:54:12,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-29 03:54:12,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-29 03:54:12,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-29 03:54:12,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-29 03:54:12,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-29 03:54:12,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-29 03:54:12,831 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-29 03:54:12,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-29 03:54:12,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-29 03:54:12,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-29 03:54:12,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-29 03:54:12,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-29 03:54:12,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-29 03:54:12,857 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 [2021-04-29 03:54:12,886 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-29 03:54:12,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-29 03:54:12,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-29 03:54:12,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-29 03:54:12,888 INFO L138 SettingsManager]: * Use SBE=true [2021-04-29 03:54:12,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-29 03:54:12,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-29 03:54:12,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-29 03:54:12,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-29 03:54:12,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-29 03:54:12,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-29 03:54:12,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-29 03:54:12,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-29 03:54:12,890 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-29 03:54:12,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-29 03:54:12,891 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-29 03:54:12,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-29 03:54:12,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-29 03:54:12,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-29 03:54:12,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-29 03:54:12,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-29 03:54:12,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-29 03:54:12,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-29 03:54:12,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-29 03:54:12,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-29 03:54:12,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-29 03:54:12,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-29 03:54:12,894 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=SEMANTIC_BASED_MOVER_CHECK_WITH_PREDICATES [2021-04-29 03:54:12,894 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-04-29 03:54:12,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-04-29 03:54:12,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-29 03:54:13,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-29 03:54:13,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-29 03:54:13,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-29 03:54:13,283 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-29 03:54:13,284 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-29 03:54:13,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure01.bpl [2021-04-29 03:54:13,287 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInForkedProcedure01.bpl' [2021-04-29 03:54:13,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-29 03:54:13,390 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-29 03:54:13,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-29 03:54:13,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-29 03:54:13,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-29 03:54:13,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-29 03:54:13,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-29 03:54:13,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-29 03:54:13,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-29 03:54:13,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/1) ... [2021-04-29 03:54:13,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-29 03:54:13,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-29 03:54:13,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-29 03:54:13,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-29 03:54:13,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (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 [2021-04-29 03:54:13,544 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-04-29 03:54:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-04-29 03:54:13,547 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-04-29 03:54:13,547 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-04-29 03:54:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-04-29 03:54:13,548 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-04-29 03:54:13,548 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-29 03:54:13,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-29 03:54:13,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-29 03:54:13,550 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-29 03:54:13,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-29 03:54:13,745 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-29 03:54:13,750 INFO L202 PluginConnector]: Adding new model ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 03:54:13 BoogieIcfgContainer [2021-04-29 03:54:13,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-29 03:54:13,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-29 03:54:13,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-29 03:54:13,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-29 03:54:13,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 29.04 03:54:13" (1/2) ... [2021-04-29 03:54:13,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b1ce3ee and model type ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 03:54:13, skipping insertion in model container [2021-04-29 03:54:13,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 03:54:13" (2/2) ... [2021-04-29 03:54:13,769 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInForkedProcedure01.bpl [2021-04-29 03:54:13,783 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-29 03:54:13,789 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-29 03:54:13,791 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-29 03:54:13,843 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:54:13,844 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:54:13,853 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:54:13,862 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:54:13,871 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-04-29 03:54:13,899 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-29 03:54:13,937 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-29 03:54:13,988 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-29 03:54:13,988 INFO L377 AbstractCegarLoop]: Hoare is false [2021-04-29 03:54:13,989 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-29 03:54:13,989 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-29 03:54:13,989 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-29 03:54:13,989 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-29 03:54:13,989 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-29 03:54:13,989 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-29 03:54:14,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 16 transitions, 51 flow [2021-04-29 03:54:14,043 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-04-29 03:54:14,044 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-04-29 03:54:14,048 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 1/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 14. Up to 3 conditions per place. [2021-04-29 03:54:14,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 16 transitions, 51 flow [2021-04-29 03:54:14,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 12 transitions, 39 flow [2021-04-29 03:54:14,054 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:54:14,078 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 12 transitions, 39 flow [2021-04-29 03:54:14,085 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 12 transitions, 39 flow [2021-04-29 03:54:14,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 17 places, 12 transitions, 39 flow [2021-04-29 03:54:14,097 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-04-29 03:54:14,097 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-04-29 03:54:14,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23 conditions, 13 events. 1/13 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 12. Up to 3 conditions per place. [2021-04-29 03:54:14,100 INFO L146 LiptonReduction]: Number of co-enabled transitions 28 [2021-04-29 03:54:14,257 INFO L158 LiptonReduction]: Checked pairs total: 14 [2021-04-29 03:54:14,257 INFO L160 LiptonReduction]: Total number of compositions: 3 [2021-04-29 03:54:14,261 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 208 [2021-04-29 03:54:14,274 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-04-29 03:54:14,275 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-04-29 03:54:14,275 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:54:14,276 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-04-29 03:54:14,276 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, fooErr0INUSE_VIOLATION, fooThread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-29 03:54:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:54:14,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2034643757, now seen corresponding path program 1 times [2021-04-29 03:54:14,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:54:14,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964622269] [2021-04-29 03:54:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:54:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-29 03:54:14,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:54:14,484 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-29 03:54:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-29 03:54:14,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964622269] [2021-04-29 03:54:14,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-29 03:54:14,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-04-29 03:54:14,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75212027] [2021-04-29 03:54:14,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-29 03:54:14,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-29 03:54:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-29 03:54:14,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-29 03:54:14,553 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 19 [2021-04-29 03:54:14,555 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 12 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-04-29 03:54:14,555 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-04-29 03:54:14,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 19 [2021-04-29 03:54:14,557 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-04-29 03:54:14,605 INFO L129 PetriNetUnfolder]: 1/14 cut-off events. [2021-04-29 03:54:14,606 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-04-29 03:54:14,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 14 events. 1/14 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 16 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 17. Up to 6 conditions per place. [2021-04-29 03:54:14,609 INFO L132 encePairwiseOnDemand]: 15/19 looper letters, 1 selfloop transitions, 3 changer transitions 1/12 dead transitions. [2021-04-29 03:54:14,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 12 transitions, 47 flow [2021-04-29 03:54:14,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-29 03:54:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-04-29 03:54:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2021-04-29 03:54:14,624 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7719298245614035 [2021-04-29 03:54:14,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2021-04-29 03:54:14,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2021-04-29 03:54:14,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-04-29 03:54:14,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2021-04-29 03:54:14,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2021-04-29 03:54:14,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-04-29 03:54:14,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-04-29 03:54:14,640 INFO L185 Difference]: Start difference. First operand has 17 places, 12 transitions, 39 flow. Second operand 3 states and 44 transitions. [2021-04-29 03:54:14,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 12 transitions, 47 flow [2021-04-29 03:54:14,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 12 transitions, 37 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-04-29 03:54:14,651 INFO L241 Difference]: Finished difference. Result has 16 places, 11 transitions, 38 flow [2021-04-29 03:54:14,653 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=16, PETRI_TRANSITIONS=11} [2021-04-29 03:54:14,654 INFO L343 CegarLoopForPetriNet]: 17 programPoint places, -1 predicate places. [2021-04-29 03:54:14,655 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:54:14,655 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 11 transitions, 38 flow [2021-04-29 03:54:14,656 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 11 transitions, 38 flow [2021-04-29 03:54:14,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 11 transitions, 38 flow [2021-04-29 03:54:14,671 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-04-29 03:54:14,672 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:54:14,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 13 events. 1/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 9. Up to 6 conditions per place. [2021-04-29 03:54:14,673 INFO L146 LiptonReduction]: Number of co-enabled transitions 24 [2021-04-29 03:54:14,674 INFO L158 LiptonReduction]: Checked pairs total: 0 [2021-04-29 03:54:14,675 INFO L160 LiptonReduction]: Total number of compositions: 0 [2021-04-29 03:54:14,675 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 20 [2021-04-29 03:54:14,679 INFO L480 AbstractCegarLoop]: Abstraction has has 15 places, 11 transitions, 38 flow [2021-04-29 03:54:14,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-04-29 03:54:14,680 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:54:14,680 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-04-29 03:54:14,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-29 03:54:14,680 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, fooErr0INUSE_VIOLATION, fooThread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-29 03:54:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:54:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2034645710, now seen corresponding path program 1 times [2021-04-29 03:54:14,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:54:14,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024879764] [2021-04-29 03:54:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:54:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-29 03:54:14,714 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:54:14,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-29 03:54:14,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:54:14,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-04-29 03:54:14,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-04-29 03:54:14,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-04-29 03:54:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-29 03:54:14,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024879764] [2021-04-29 03:54:14,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-29 03:54:14,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-29 03:54:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715821865] [2021-04-29 03:54:14,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-29 03:54:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-29 03:54:14,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-29 03:54:14,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-29 03:54:14,728 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 19 [2021-04-29 03:54:14,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 11 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-04-29 03:54:14,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-04-29 03:54:14,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 19 [2021-04-29 03:54:14,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-04-29 03:54:14,742 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-04-29 03:54:14,742 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-04-29 03:54:14,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 11 events. 1/11 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 9 event pairs, 0 based on Foata normal form. 1/8 useless extension candidates. Maximal degree in co-relation 16. Up to 5 conditions per place. [2021-04-29 03:54:14,743 INFO L132 encePairwiseOnDemand]: 17/19 looper letters, 0 selfloop transitions, 1 changer transitions 1/10 dead transitions. [2021-04-29 03:54:14,743 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 37 flow [2021-04-29 03:54:14,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-29 03:54:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-04-29 03:54:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2021-04-29 03:54:14,744 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9298245614035088 [2021-04-29 03:54:14,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2021-04-29 03:54:14,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2021-04-29 03:54:14,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-04-29 03:54:14,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2021-04-29 03:54:14,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-04-29 03:54:14,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-04-29 03:54:14,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2021-04-29 03:54:14,747 INFO L185 Difference]: Start difference. First operand has 15 places, 11 transitions, 38 flow. Second operand 3 states and 53 transitions. [2021-04-29 03:54:14,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 10 transitions, 37 flow [2021-04-29 03:54:14,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 28 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-04-29 03:54:14,749 INFO L241 Difference]: Finished difference. Result has 14 places, 9 transitions, 26 flow [2021-04-29 03:54:14,749 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=19, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=14, PETRI_TRANSITIONS=9} [2021-04-29 03:54:14,750 INFO L343 CegarLoopForPetriNet]: 17 programPoint places, -3 predicate places. [2021-04-29 03:54:14,750 INFO L171 etLargeBlockEncoding]: Petri net LBE is using conditional semantic-based independence relation. [2021-04-29 03:54:14,751 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 14 places, 9 transitions, 26 flow [2021-04-29 03:54:14,751 INFO L133 LiptonReduction]: Starting Lipton reduction on Petri net that has 14 places, 9 transitions, 26 flow [2021-04-29 03:54:14,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 9 transitions, 26 flow [2021-04-29 03:54:14,755 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-04-29 03:54:14,758 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-04-29 03:54:14,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 10 events. 1/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 6 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 13. Up to 5 conditions per place. [2021-04-29 03:54:14,759 INFO L146 LiptonReduction]: Number of co-enabled transitions 12 [2021-04-29 03:54:14,761 INFO L158 LiptonReduction]: Checked pairs total: 0 [2021-04-29 03:54:14,762 INFO L160 LiptonReduction]: Total number of compositions: 0 [2021-04-29 03:54:14,762 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 12 [2021-04-29 03:54:14,768 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 9 transitions, 26 flow [2021-04-29 03:54:14,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-04-29 03:54:14,768 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-04-29 03:54:14,769 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-04-29 03:54:14,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-29 03:54:14,769 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, fooErr0INUSE_VIOLATION, fooThread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-29 03:54:14,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-29 03:54:14,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1350552273, now seen corresponding path program 1 times [2021-04-29 03:54:14,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-29 03:54:14,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321089942] [2021-04-29 03:54:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-29 03:54:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-29 03:54:14,794 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-29 03:54:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-04-29 03:54:14,806 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-04-29 03:54:14,831 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-04-29 03:54:14,832 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-04-29 03:54:14,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-29 03:54:14,849 INFO L202 PluginConnector]: Adding new model ForkInForkedProcedure01.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 03:54:14 BasicIcfg [2021-04-29 03:54:14,850 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-29 03:54:14,851 INFO L168 Benchmark]: Toolchain (without parser) took 1509.66 ms. Allocated memory is still 302.0 MB. Free memory was 270.9 MB in the beginning and 280.7 MB in the end (delta: -9.9 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:54:14,852 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.80 ms. Allocated memory is still 302.0 MB. Free memory was 271.9 MB in the beginning and 271.8 MB in the end (delta: 115.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:54:14,853 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.46 ms. Allocated memory is still 302.0 MB. Free memory was 285.0 MB in the beginning and 283.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:54:14,854 INFO L168 Benchmark]: Boogie Preprocessor took 16.81 ms. Allocated memory is still 302.0 MB. Free memory was 283.5 MB in the beginning and 282.6 MB in the end (delta: 876.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-29 03:54:14,855 INFO L168 Benchmark]: RCFGBuilder took 305.21 ms. Allocated memory is still 302.0 MB. Free memory was 282.6 MB in the beginning and 280.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-04-29 03:54:14,855 INFO L168 Benchmark]: TraceAbstraction took 1093.88 ms. Allocated memory is still 302.0 MB. Free memory was 280.4 MB in the beginning and 280.7 MB in the end (delta: -372.5 kB). Peak memory consumption was 661.1 kB. Max. memory is 16.0 GB. [2021-04-29 03:54:14,859 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 0.80 ms. Allocated memory is still 302.0 MB. Free memory was 271.9 MB in the beginning and 271.8 MB in the end (delta: 115.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.46 ms. Allocated memory is still 302.0 MB. Free memory was 285.0 MB in the beginning and 283.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.81 ms. Allocated memory is still 302.0 MB. Free memory was 283.5 MB in the beginning and 282.6 MB in the end (delta: 876.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 305.21 ms. Allocated memory is still 302.0 MB. Free memory was 282.6 MB in the beginning and 280.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1093.88 ms. Allocated memory is still 302.0 MB. Free memory was 280.4 MB in the beginning and 280.7 MB in the end (delta: -372.5 kB). Peak memory consumption was 661.1 kB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 173.0ms, 17 PlacesBefore, 17 PlacesAfterwards, 12 TransitionsBefore, 12 TransitionsAfterwards, 28 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 14 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12, positive: 11, positive conditional: 11, positive unconditional: 0, negative: 1, negative conditional: 1, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 11, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 11, positive: 10, positive conditional: 0, positive unconditional: 10, 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: 11, positive: 10, positive conditional: 0, positive unconditional: 10, 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: 9, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12, positive: 1, positive conditional: 1, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11, unknown conditional: 11, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 10, Positive conditional cache size: 10, Positive unconditional cache size: 0, Negative cache size: 1, Negative conditional cache size: 1, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18.5ms, 16 PlacesBefore, 15 PlacesAfterwards, 11 TransitionsBefore, 11 TransitionsAfterwards, 24 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): 11, Positive cache size: 10, Positive conditional cache size: 10, Positive unconditional cache size: 0, Negative cache size: 1, Negative conditional cache size: 1, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 10.8ms, 14 PlacesBefore, 13 PlacesAfterwards, 9 TransitionsBefore, 9 TransitionsAfterwards, 12 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): 11, Positive cache size: 10, Positive conditional cache size: 10, Positive unconditional cache size: 0, Negative cache size: 1, Negative conditional cache size: 1, Negative unconditional cache size: 0 - CounterExampleResult [Line: 23]: 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] [L36] 2 res := 23; [L21] JOIN 2 join 2; VAL [g=0, n=0, n=0, res=23, x=0] [L30] 1 g := g + 1; [L23] 0 assert g == 0; VAL [g=1, n=0, n=0, res=23, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 852.0ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 132.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 278.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=0, InterpolantAutomatonStates: 6, 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: 11.2ms SsaConstructionTime, 53.6ms SatisfiabilityAnalysisTime, 100.1ms InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 26 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...