/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/ForkJoinExplained.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:54:51,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:54:51,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:54:51,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 07:54:51,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 07:54:51,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 07:54:51,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 07:54:51,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 07:54:51,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 07:54:51,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 07:54:51,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 07:54:51,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 07:54:51,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 07:54:51,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 07:54:51,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 07:54:51,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 07:54:51,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 07:54:51,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 07:54:51,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 07:54:51,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 07:54:51,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 07:54:51,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 07:54:51,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 07:54:51,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 07:54:51,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-25 07:54:51,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 07:54:51,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 07:54:51,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 07:54:51,365 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-RepeatedVariableLbe.epf [2021-03-25 07:54:51,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:54:51,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:54:51,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:54:51,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:54:51,399 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:54:51,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:54:51,399 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:54:51,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:54:51,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:54:51,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:54:51,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:54:51,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:54:51,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:54:51,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:54:51,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:54:51,401 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:54:51,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:54:51,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:54:51,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:54:51,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:54:51,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:54:51,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:54:51,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:54:51,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:54:51,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:54:51,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:54:51,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:54:51,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:54:51,403 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:54:51,403 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:54:51,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:54:51,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:54:51,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:54:51,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:54:51,726 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-25 07:54:51,728 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-25 07:54:51,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/ForkJoinExplained.bpl [2021-03-25 07:54:51,729 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/ForkJoinExplained.bpl' [2021-03-25 07:54:51,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:54:51,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-25 07:54:51,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:51,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:54:51,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:54:51,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:54:51,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:54:51,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:54:51,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:54:51,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/1) ... [2021-03-25 07:54:51,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:54:51,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:54:51,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:54:51,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:54:51,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (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 [2021-03-25 07:54:51,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-25 07:54:51,915 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-25 07:54:51,915 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-25 07:54:51,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-25 07:54:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:54:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:54:51,916 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 07:54:52,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:54:52,054 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-25 07:54:52,055 INFO L202 PluginConnector]: Adding new model ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:52 BoogieIcfgContainer [2021-03-25 07:54:52,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:54:52,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:54:52,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:54:52,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:54:52,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 25.03 07:54:51" (1/2) ... [2021-03-25 07:54:52,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5d2328 and model type ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:54:52, skipping insertion in model container [2021-03-25 07:54:52,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:54:52" (2/2) ... [2021-03-25 07:54:52,066 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkJoinExplained.bpl [2021-03-25 07:54:52,070 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:54:52,075 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-03-25 07:54:52,076 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:54:52,103 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,104 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,104 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,106 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,106 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,107 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,107 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,108 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,109 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,109 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,110 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,111 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,112 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,112 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,112 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,113 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,116 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,135 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:54:52,148 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-25 07:54:52,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-25 07:54:52,181 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:54:52,181 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:54:52,181 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:54:52,181 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:54:52,181 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:54:52,181 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:54:52,182 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:54:52,182 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:54:52,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 31 transitions, 84 flow [2021-03-25 07:54:52,210 INFO L129 PetriNetUnfolder]: 3/33 cut-off events. [2021-03-25 07:54:52,210 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 07:54:52,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 33 events. 3/33 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 23. Up to 3 conditions per place. [2021-03-25 07:54:52,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 31 transitions, 84 flow [2021-03-25 07:54:52,233 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 72 flow [2021-03-25 07:54:52,234 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:52,244 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 30 places, 27 transitions, 72 flow [2021-03-25 07:54:52,250 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 30 places, 27 transitions, 72 flow [2021-03-25 07:54:52,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 72 flow [2021-03-25 07:54:52,271 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2021-03-25 07:54:52,271 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 07:54:52,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 31 events. 3/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 23. Up to 3 conditions per place. [2021-03-25 07:54:52,276 INFO L142 LiptonReduction]: Number of co-enabled transitions 252 [2021-03-25 07:54:52,771 INFO L154 LiptonReduction]: Checked pairs total: 196 [2021-03-25 07:54:52,771 INFO L156 LiptonReduction]: Total number of compositions: 17 [2021-03-25 07:54:52,773 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 540 [2021-03-25 07:54:52,780 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-03-25 07:54:52,780 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 07:54:52,780 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:52,781 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:52,781 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1317832480, now seen corresponding path program 1 times [2021-03-25 07:54:52,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:52,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984882211] [2021-03-25 07:54:52,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:52,884 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:52,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:52,886 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:52,886 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:52,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:52,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:52,918 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 07:54:52,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:52,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984882211] [2021-03-25 07:54:52,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:52,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-25 07:54:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207720885] [2021-03-25 07:54:52,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 07:54:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:52,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 07:54:52,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-25 07:54:52,950 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 48 [2021-03-25 07:54:52,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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) [2021-03-25 07:54:52,952 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:52,952 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 48 [2021-03-25 07:54:52,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:53,027 INFO L129 PetriNetUnfolder]: 5/23 cut-off events. [2021-03-25 07:54:53,027 INFO L130 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2021-03-25 07:54:53,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 23 events. 5/23 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 50 event pairs, 0 based on Foata normal form. 1/19 useless extension candidates. Maximal degree in co-relation 32. Up to 7 conditions per place. [2021-03-25 07:54:53,029 INFO L132 encePairwiseOnDemand]: 42/48 looper letters, 6 selfloop transitions, 8 changer transitions 0/20 dead transitions. [2021-03-25 07:54:53,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 89 flow [2021-03-25 07:54:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-25 07:54:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-25 07:54:53,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2021-03-25 07:54:53,038 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.65625 [2021-03-25 07:54:53,038 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 189 transitions. [2021-03-25 07:54:53,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 189 transitions. [2021-03-25 07:54:53,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:53,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 189 transitions. [2021-03-25 07:54:53,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 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) [2021-03-25 07:54:53,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 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) [2021-03-25 07:54:53,048 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 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) [2021-03-25 07:54:53,050 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 44 flow. Second operand 6 states and 189 transitions. [2021-03-25 07:54:53,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 89 flow [2021-03-25 07:54:53,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 75 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-25 07:54:53,054 INFO L241 Difference]: Finished difference. Result has 20 places, 18 transitions, 68 flow [2021-03-25 07:54:53,056 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=68, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2021-03-25 07:54:53,056 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 2 predicate places. [2021-03-25 07:54:53,057 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:53,057 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 18 transitions, 68 flow [2021-03-25 07:54:53,057 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 18 transitions, 68 flow [2021-03-25 07:54:53,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 18 transitions, 68 flow [2021-03-25 07:54:53,061 INFO L129 PetriNetUnfolder]: 3/19 cut-off events. [2021-03-25 07:54:53,061 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 07:54:53,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 19 events. 3/19 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 33 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 2. Up to 7 conditions per place. [2021-03-25 07:54:53,062 INFO L142 LiptonReduction]: Number of co-enabled transitions 14 [2021-03-25 07:54:53,063 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:53,063 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:53,063 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 7 [2021-03-25 07:54:53,064 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 68 flow [2021-03-25 07:54:53,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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) [2021-03-25 07:54:53,064 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:53,064 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:53,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:54:53,065 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:53,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:53,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1317832435, now seen corresponding path program 1 times [2021-03-25 07:54:53,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:53,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276274229] [2021-03-25 07:54:53,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:53,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,096 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,120 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,129 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 07:54:53,130 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:53,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276274229] [2021-03-25 07:54:53,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:53,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 07:54:53,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847541858] [2021-03-25 07:54:53,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 07:54:53,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 07:54:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-25 07:54:53,139 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2021-03-25 07:54:53,139 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-03-25 07:54:53,139 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:53,140 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2021-03-25 07:54:53,140 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:53,165 INFO L129 PetriNetUnfolder]: 5/25 cut-off events. [2021-03-25 07:54:53,166 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-03-25 07:54:53,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 25 events. 5/25 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 13 conditions per place. [2021-03-25 07:54:53,166 INFO L132 encePairwiseOnDemand]: 43/48 looper letters, 9 selfloop transitions, 5 changer transitions 0/21 dead transitions. [2021-03-25 07:54:53,166 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 106 flow [2021-03-25 07:54:53,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-25 07:54:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-25 07:54:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2021-03-25 07:54:53,175 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2021-03-25 07:54:53,175 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 130 transitions. [2021-03-25 07:54:53,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 130 transitions. [2021-03-25 07:54:53,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:53,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 130 transitions. [2021-03-25 07:54:53,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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) [2021-03-25 07:54:53,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 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) [2021-03-25 07:54:53,177 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 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) [2021-03-25 07:54:53,178 INFO L185 Difference]: Start difference. First operand has 20 places, 18 transitions, 68 flow. Second operand 5 states and 130 transitions. [2021-03-25 07:54:53,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 106 flow [2021-03-25 07:54:53,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 101 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-25 07:54:53,179 INFO L241 Difference]: Finished difference. Result has 24 places, 20 transitions, 88 flow [2021-03-25 07:54:53,179 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2021-03-25 07:54:53,180 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 6 predicate places. [2021-03-25 07:54:53,180 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:53,180 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 20 transitions, 88 flow [2021-03-25 07:54:53,181 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 20 transitions, 88 flow [2021-03-25 07:54:53,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 88 flow [2021-03-25 07:54:53,184 INFO L129 PetriNetUnfolder]: 4/23 cut-off events. [2021-03-25 07:54:53,184 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-25 07:54:53,185 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 23 events. 4/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 51 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 7 conditions per place. [2021-03-25 07:54:53,185 INFO L142 LiptonReduction]: Number of co-enabled transitions 10 [2021-03-25 07:54:53,186 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:53,186 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:53,186 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6 [2021-03-25 07:54:53,192 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 88 flow [2021-03-25 07:54:53,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-03-25 07:54:53,193 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:53,193 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-25 07:54:53,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-25 07:54:53,193 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1318408105, now seen corresponding path program 1 times [2021-03-25 07:54:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:53,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244223315] [2021-03-25 07:54:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:53,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:53,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,220 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:54:53,222 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:54:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:53,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244223315] [2021-03-25 07:54:53,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:53,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-25 07:54:53,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241550584] [2021-03-25 07:54:53,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 07:54:53,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 07:54:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 07:54:53,236 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 48 [2021-03-25 07:54:53,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-03-25 07:54:53,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:53,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 48 [2021-03-25 07:54:53,237 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:53,244 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-25 07:54:53,244 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-25 07:54:53,248 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 10 events. 1/10 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 3/13 useless extension candidates. Maximal degree in co-relation 21. Up to 4 conditions per place. [2021-03-25 07:54:53,248 INFO L132 encePairwiseOnDemand]: 45/48 looper letters, 0 selfloop transitions, 1 changer transitions 1/10 dead transitions. [2021-03-25 07:54:53,248 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 10 transitions, 53 flow [2021-03-25 07:54:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 07:54:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 07:54:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2021-03-25 07:54:53,255 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9375 [2021-03-25 07:54:53,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2021-03-25 07:54:53,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2021-03-25 07:54:53,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:53,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2021-03-25 07:54:53,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-03-25 07:54:53,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2021-03-25 07:54:53,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 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) [2021-03-25 07:54:53,258 INFO L185 Difference]: Start difference. First operand has 24 places, 20 transitions, 88 flow. Second operand 3 states and 135 transitions. [2021-03-25 07:54:53,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 10 transitions, 53 flow [2021-03-25 07:54:53,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 10 transitions, 39 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-25 07:54:53,264 INFO L241 Difference]: Finished difference. Result has 17 places, 9 transitions, 37 flow [2021-03-25 07:54:53,264 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=15, 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=37, PETRI_PLACES=17, PETRI_TRANSITIONS=9} [2021-03-25 07:54:53,264 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, -1 predicate places. [2021-03-25 07:54:53,264 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:53,264 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 17 places, 9 transitions, 37 flow [2021-03-25 07:54:53,265 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 17 places, 9 transitions, 37 flow [2021-03-25 07:54:53,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 9 transitions, 37 flow [2021-03-25 07:54:53,268 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-25 07:54:53,268 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:53,268 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 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 8 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 13. Up to 4 conditions per place. [2021-03-25 07:54:53,268 INFO L142 LiptonReduction]: Number of co-enabled transitions 4 [2021-03-25 07:54:53,269 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:53,269 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:53,269 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 5 [2021-03-25 07:54:53,270 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 9 transitions, 37 flow [2021-03-25 07:54:53,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-03-25 07:54:53,270 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:53,271 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:53,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-25 07:54:53,271 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:53,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2096867767, now seen corresponding path program 1 times [2021-03-25 07:54:53,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:53,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997347828] [2021-03-25 07:54:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:53,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,316 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,317 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,327 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,352 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 07:54:53,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:53,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997347828] [2021-03-25 07:54:53,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:53,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:53,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399330026] [2021-03-25 07:54:53,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 07:54:53,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:53,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 07:54:53,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-25 07:54:53,363 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2021-03-25 07:54:53,363 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 9 transitions, 37 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,363 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:53,363 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2021-03-25 07:54:53,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:53,398 INFO L129 PetriNetUnfolder]: 1/13 cut-off events. [2021-03-25 07:54:53,398 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-25 07:54:53,398 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 13 events. 1/13 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 19 event pairs, 0 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 17. Up to 5 conditions per place. [2021-03-25 07:54:53,399 INFO L132 encePairwiseOnDemand]: 42/48 looper letters, 3 selfloop transitions, 5 changer transitions 2/11 dead transitions. [2021-03-25 07:54:53,399 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 11 transitions, 66 flow [2021-03-25 07:54:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 07:54:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 07:54:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2021-03-25 07:54:53,401 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2021-03-25 07:54:53,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 158 transitions. [2021-03-25 07:54:53,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 158 transitions. [2021-03-25 07:54:53,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:53,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 158 transitions. [2021-03-25 07:54:53,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 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) [2021-03-25 07:54:53,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 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) [2021-03-25 07:54:53,407 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 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) [2021-03-25 07:54:53,408 INFO L185 Difference]: Start difference. First operand has 16 places, 9 transitions, 37 flow. Second operand 7 states and 158 transitions. [2021-03-25 07:54:53,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 11 transitions, 66 flow [2021-03-25 07:54:53,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 11 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-25 07:54:53,409 INFO L241 Difference]: Finished difference. Result has 23 places, 9 transitions, 52 flow [2021-03-25 07:54:53,409 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52, PETRI_PLACES=23, PETRI_TRANSITIONS=9} [2021-03-25 07:54:53,410 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2021-03-25 07:54:53,410 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:53,410 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 9 transitions, 52 flow [2021-03-25 07:54:53,410 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 9 transitions, 52 flow [2021-03-25 07:54:53,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 9 transitions, 52 flow [2021-03-25 07:54:53,413 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:54:53,413 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2021-03-25 07:54:53,413 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 11 events. 1/11 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 29. Up to 5 conditions per place. [2021-03-25 07:54:53,413 INFO L142 LiptonReduction]: Number of co-enabled transitions 2 [2021-03-25 07:54:53,414 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:53,414 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:53,414 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 4 [2021-03-25 07:54:53,415 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 9 transitions, 52 flow [2021-03-25 07:54:53,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,415 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:53,415 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:53,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-25 07:54:53,416 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2079010837, now seen corresponding path program 2 times [2021-03-25 07:54:53,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:53,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654058050] [2021-03-25 07:54:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:53,463 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,468 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,469 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-25 07:54:53,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,496 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 07:54:53,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:53,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654058050] [2021-03-25 07:54:53,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:53,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:53,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646082353] [2021-03-25 07:54:53,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 07:54:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 07:54:53,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 07:54:53,506 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2021-03-25 07:54:53,506 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 9 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,507 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:53,507 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2021-03-25 07:54:53,507 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:53,525 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-25 07:54:53,525 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-25 07:54:53,526 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 11 events. 0/11 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-03-25 07:54:53,526 INFO L132 encePairwiseOnDemand]: 42/48 looper letters, 2 selfloop transitions, 4 changer transitions 3/10 dead transitions. [2021-03-25 07:54:53,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 10 transitions, 79 flow [2021-03-25 07:54:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 07:54:53,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 07:54:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2021-03-25 07:54:53,528 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2021-03-25 07:54:53,528 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 157 transitions. [2021-03-25 07:54:53,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 157 transitions. [2021-03-25 07:54:53,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:53,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 157 transitions. [2021-03-25 07:54:53,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 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) [2021-03-25 07:54:53,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 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) [2021-03-25 07:54:53,530 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 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) [2021-03-25 07:54:53,530 INFO L185 Difference]: Start difference. First operand has 21 places, 9 transitions, 52 flow. Second operand 7 states and 157 transitions. [2021-03-25 07:54:53,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 10 transitions, 79 flow [2021-03-25 07:54:53,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 65 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-03-25 07:54:53,531 INFO L241 Difference]: Finished difference. Result has 23 places, 7 transitions, 38 flow [2021-03-25 07:54:53,532 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38, PETRI_PLACES=23, PETRI_TRANSITIONS=7} [2021-03-25 07:54:53,532 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2021-03-25 07:54:53,532 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:53,532 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 23 places, 7 transitions, 38 flow [2021-03-25 07:54:53,532 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 23 places, 7 transitions, 38 flow [2021-03-25 07:54:53,532 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 7 transitions, 38 flow [2021-03-25 07:54:53,534 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-25 07:54:53,534 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:54:53,534 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 7 events. 0/7 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 07:54:53,535 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:53,535 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:53,535 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:53,535 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3 [2021-03-25 07:54:53,536 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 7 transitions, 38 flow [2021-03-25 07:54:53,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,536 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:54:53,536 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:54:53,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 07:54:53,537 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1ASSERT_VIOLATIONASSERT]=== [2021-03-25 07:54:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:54:53,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2079039667, now seen corresponding path program 3 times [2021-03-25 07:54:53,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:54:53,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369548171] [2021-03-25 07:54:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:54:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:54:53,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-25 07:54:53,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:54:53,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:54:53,588 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-03-25 07:54:53,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-25 07:54:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:54:53,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369548171] [2021-03-25 07:54:53,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:54:53,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-25 07:54:53,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815621284] [2021-03-25 07:54:53,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-25 07:54:53,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:54:53,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-25 07:54:53,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-25 07:54:53,601 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 48 [2021-03-25 07:54:53,601 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 7 transitions, 38 flow. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,601 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:54:53,601 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 48 [2021-03-25 07:54:53,601 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:54:53,614 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-25 07:54:53,614 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-25 07:54:53,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 6 events. 0/6 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-25 07:54:53,615 INFO L132 encePairwiseOnDemand]: 42/48 looper letters, 0 selfloop transitions, 0 changer transitions 6/6 dead transitions. [2021-03-25 07:54:53,615 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 6 transitions, 42 flow [2021-03-25 07:54:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-25 07:54:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-25 07:54:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2021-03-25 07:54:53,620 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2021-03-25 07:54:53,620 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 153 transitions. [2021-03-25 07:54:53,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 153 transitions. [2021-03-25 07:54:53,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:54:53,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 153 transitions. [2021-03-25 07:54:53,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 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) [2021-03-25 07:54:53,627 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 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) [2021-03-25 07:54:53,627 INFO L185 Difference]: Start difference. First operand has 20 places, 7 transitions, 38 flow. Second operand 7 states and 153 transitions. [2021-03-25 07:54:53,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 6 transitions, 42 flow [2021-03-25 07:54:53,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 6 transitions, 28 flow, removed 1 selfloop flow, removed 7 redundant places. [2021-03-25 07:54:53,628 INFO L241 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2021-03-25 07:54:53,628 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2021-03-25 07:54:53,628 INFO L343 CegarLoopForPetriNet]: 18 programPoint places, 0 predicate places. [2021-03-25 07:54:53,628 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:54:53,629 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 18 places, 0 transitions, 0 flow [2021-03-25 07:54:53,629 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 18 places, 0 transitions, 0 flow [2021-03-25 07:54:53,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:53,629 INFO L129 PetriNetUnfolder]: 0/0 cut-off events. [2021-03-25 07:54:53,629 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:54:53,629 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. [2021-03-25 07:54:53,629 INFO L142 LiptonReduction]: Number of co-enabled transitions 0 [2021-03-25 07:54:53,629 INFO L154 LiptonReduction]: Checked pairs total: 0 [2021-03-25 07:54:53,629 INFO L156 LiptonReduction]: Total number of compositions: 0 [2021-03-25 07:54:53,630 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2 [2021-03-25 07:54:53,630 INFO L480 AbstractCegarLoop]: Abstraction has has 0 places, 0 transitions, 0 flow [2021-03-25 07:54:53,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 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) [2021-03-25 07:54:53,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-25 07:54:53,634 INFO L202 PluginConnector]: Adding new model ForkJoinExplained.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:54:53 BasicIcfg [2021-03-25 07:54:53,634 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:54:53,635 INFO L168 Benchmark]: Toolchain (without parser) took 1813.54 ms. Allocated memory is still 375.4 MB. Free memory was 355.8 MB in the beginning and 221.3 MB in the end (delta: 134.4 MB). Peak memory consumption was 136.9 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:53,635 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.53 ms. Allocated memory is still 375.4 MB. Free memory was 356.8 MB in the beginning and 356.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:53,636 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.33 ms. Allocated memory is still 375.4 MB. Free memory was 355.7 MB in the beginning and 354.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:53,636 INFO L168 Benchmark]: Boogie Preprocessor took 10.17 ms. Allocated memory is still 375.4 MB. Free memory was 354.2 MB in the beginning and 353.4 MB in the end (delta: 839.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:54:53,636 INFO L168 Benchmark]: RCFGBuilder took 196.96 ms. Allocated memory is still 375.4 MB. Free memory was 353.3 MB in the beginning and 343.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:53,637 INFO L168 Benchmark]: TraceAbstraction took 1575.11 ms. Allocated memory is still 375.4 MB. Free memory was 343.2 MB in the beginning and 221.3 MB in the end (delta: 121.9 MB). Peak memory consumption was 124.3 MB. Max. memory is 16.0 GB. [2021-03-25 07:54:53,638 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 0.53 ms. Allocated memory is still 375.4 MB. Free memory was 356.8 MB in the beginning and 356.7 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.33 ms. Allocated memory is still 375.4 MB. Free memory was 355.7 MB in the beginning and 354.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.17 ms. Allocated memory is still 375.4 MB. Free memory was 354.2 MB in the beginning and 353.4 MB in the end (delta: 839.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 196.96 ms. Allocated memory is still 375.4 MB. Free memory was 353.3 MB in the beginning and 343.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1575.11 ms. Allocated memory is still 375.4 MB. Free memory was 343.2 MB in the beginning and 221.3 MB in the end (delta: 121.9 MB). Peak memory consumption was 124.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 521.3ms, 30 PlacesBefore, 18 PlacesAfterwards, 27 TransitionsBefore, 13 TransitionsAfterwards, 252 CoEnabledTransitionPairs, 3 FixpointIterations, 1 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 17 TotalNumberOfCompositions, 196 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 174, positive: 170, positive conditional: 0, positive unconditional: 170, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 128, positive: 124, positive conditional: 0, positive unconditional: 124, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 128, positive: 124, positive conditional: 0, positive unconditional: 124, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 174, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 128, unknown conditional: 0, unknown unconditional: 128] , 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: 6.0ms, 20 PlacesBefore, 20 PlacesAfterwards, 18 TransitionsBefore, 18 TransitionsAfterwards, 14 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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.9ms, 24 PlacesBefore, 24 PlacesAfterwards, 20 TransitionsBefore, 20 TransitionsAfterwards, 10 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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3ms, 17 PlacesBefore, 16 PlacesAfterwards, 9 TransitionsBefore, 9 TransitionsAfterwards, 4 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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1ms, 23 PlacesBefore, 21 PlacesAfterwards, 9 TransitionsBefore, 9 TransitionsAfterwards, 2 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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0ms, 23 PlacesBefore, 20 PlacesAfterwards, 7 TransitionsBefore, 7 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: 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] , 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 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.7ms, 18 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: 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] , 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: 70]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 61]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1453.7ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 285.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 595.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 22 SDtfs, 30 SDslu, 18 SDs, 0 SdLazy, 83 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 67.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 174.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=2, InterpolantAutomatonStates: 35, 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: 5.5ms SsaConstructionTime, 53.0ms SatisfiabilityAnalysisTime, 351.5ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 231 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...