/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/sum_invariant.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:32:35,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:32:35,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:32:35,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:32:35,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:32:35,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:32:35,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:32:35,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:32:35,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:32:35,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:32:35,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:32:35,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-03-11 22:32:35,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:32:35,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:32:35,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:32:35,911 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-SemanticLbe.epf [2021-03-11 22:32:35,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:32:35,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:32:35,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:32:35,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:32:35,947 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:32:35,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:32:35,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:32:35,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:32:35,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:32:35,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:32:35,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:32:35,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:32:35,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:32:35,948 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:32:35,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:32:35,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:32:35,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:32:35,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:32:35,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:32:35,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:32:35,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:32:35,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:32:35,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:32:35,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:32:35,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:32:35,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:32:35,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:32:35,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:32:35,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:32:36,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:32:36,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:32:36,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:32:36,278 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:32:36,279 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:32:36,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/sum_invariant.bpl [2021-03-11 22:32:36,280 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/sum_invariant.bpl' [2021-03-11 22:32:36,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:32:36,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:32:36,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:32:36,320 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:32:36,320 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:32:36,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:32:36,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:32:36,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:32:36,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:32:36,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... [2021-03-11 22:32:36,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:32:36,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:32:36,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:32:36,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:32:36,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:32:36,413 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 22:32:36,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:32:36,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:32:36,414 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-03-11 22:32:36,415 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-03-11 22:32:36,415 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-03-11 22:32:36,416 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:32:36,515 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:32:36,516 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 22:32:36,517 INFO L202 PluginConnector]: Adding new model sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:32:36 BoogieIcfgContainer [2021-03-11 22:32:36,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:32:36,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:32:36,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:32:36,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:32:36,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:32:36" (1/2) ... [2021-03-11 22:32:36,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e781760 and model type sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:32:36, skipping insertion in model container [2021-03-11 22:32:36,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:32:36" (2/2) ... [2021-03-11 22:32:36,523 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_invariant.bpl [2021-03-11 22:32:36,527 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:32:36,530 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 22:32:36,531 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:32:36,552 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,553 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,553 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,553 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,554 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,554 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,555 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,555 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,555 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,555 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,556 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,556 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,556 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,557 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,557 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,557 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,557 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,558 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,558 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,558 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,559 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,559 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,559 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,560 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,562 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,565 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,566 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,568 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:32:36,585 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-03-11 22:32:36,601 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-11 22:32:36,619 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:32:36,619 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:32:36,619 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:32:36,619 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:32:36,619 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:32:36,620 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:32:36,620 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:32:36,620 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:32:36,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 156 flow [2021-03-11 22:32:36,681 INFO L129 PetriNetUnfolder]: 17/56 cut-off events. [2021-03-11 22:32:36,681 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 22:32:36,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 56 events. 17/56 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 49. Up to 12 conditions per place. [2021-03-11 22:32:36,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 156 flow [2021-03-11 22:32:36,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 136 flow [2021-03-11 22:32:36,692 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:32:36,701 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 136 flow [2021-03-11 22:32:36,703 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 136 flow [2021-03-11 22:32:36,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 136 flow [2021-03-11 22:32:36,727 INFO L129 PetriNetUnfolder]: 17/54 cut-off events. [2021-03-11 22:32:36,727 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 22:32:36,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 54 events. 17/54 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 139 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 49. Up to 12 conditions per place. [2021-03-11 22:32:36,732 INFO L116 LiptonReduction]: Number of co-enabled transitions 528 [2021-03-11 22:32:37,122 INFO L131 LiptonReduction]: Checked pairs total: 986 [2021-03-11 22:32:37,123 INFO L133 LiptonReduction]: Total number of compositions: 12 [2021-03-11 22:32:37,124 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 434 [2021-03-11 22:32:37,140 INFO L129 PetriNetUnfolder]: 17/41 cut-off events. [2021-03-11 22:32:37,140 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-11 22:32:37,140 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:32:37,141 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:32:37,141 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:32:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:32:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash -953528300, now seen corresponding path program 1 times [2021-03-11 22:32:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:32:37,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589676401] [2021-03-11 22:32:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:32:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:32:37,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:32:37,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,251 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:32:37,257 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,257 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:32:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:32:37,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589676401] [2021-03-11 22:32:37,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:32:37,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:32:37,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496183092] [2021-03-11 22:32:37,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:32:37,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:32:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:32:37,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:32:37,279 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 56 [2021-03-11 22:32:37,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:32:37,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 56 [2021-03-11 22:32:37,282 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:32:37,298 INFO L129 PetriNetUnfolder]: 5/23 cut-off events. [2021-03-11 22:32:37,298 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-03-11 22:32:37,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 23 events. 5/23 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 7/30 useless extension candidates. Maximal degree in co-relation 28. Up to 6 conditions per place. [2021-03-11 22:32:37,299 INFO L132 encePairwiseOnDemand]: 52/56 looper letters, 1 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2021-03-11 22:32:37,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 86 flow [2021-03-11 22:32:37,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:32:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:32:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2021-03-11 22:32:37,309 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2021-03-11 22:32:37,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2021-03-11 22:32:37,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2021-03-11 22:32:37,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:32:37,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2021-03-11 22:32:37,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 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) [2021-03-11 22:32:37,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,320 INFO L185 Difference]: Start difference. First operand has 27 places, 26 transitions, 112 flow. Second operand 3 states and 158 transitions. [2021-03-11 22:32:37,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 86 flow [2021-03-11 22:32:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 20 transitions, 58 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-11 22:32:37,325 INFO L241 Difference]: Finished difference. Result has 21 places, 20 transitions, 56 flow [2021-03-11 22:32:37,326 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2021-03-11 22:32:37,327 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2021-03-11 22:32:37,327 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 56 flow [2021-03-11 22:32:37,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,328 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:32:37,328 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:32:37,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:32:37,328 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:32:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:32:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1970292748, now seen corresponding path program 1 times [2021-03-11 22:32:37,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:32:37,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840006601] [2021-03-11 22:32:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:32:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:32:37,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:32:37,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:32:37,354 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,354 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:32:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:32:37,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840006601] [2021-03-11 22:32:37,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:32:37,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:32:37,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026506116] [2021-03-11 22:32:37,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:32:37,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:32:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:32:37,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:32:37,358 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 56 [2021-03-11 22:32:37,359 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,359 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:32:37,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 56 [2021-03-11 22:32:37,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:32:37,369 INFO L129 PetriNetUnfolder]: 1/16 cut-off events. [2021-03-11 22:32:37,369 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-11 22:32:37,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 16 events. 1/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2021-03-11 22:32:37,370 INFO L132 encePairwiseOnDemand]: 53/56 looper letters, 1 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2021-03-11 22:32:37,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 48 flow [2021-03-11 22:32:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:32:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:32:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2021-03-11 22:32:37,376 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2021-03-11 22:32:37,376 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2021-03-11 22:32:37,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2021-03-11 22:32:37,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:32:37,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2021-03-11 22:32:37,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 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) [2021-03-11 22:32:37,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,381 INFO L185 Difference]: Start difference. First operand has 21 places, 20 transitions, 56 flow. Second operand 3 states and 157 transitions. [2021-03-11 22:32:37,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 48 flow [2021-03-11 22:32:37,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 47 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 22:32:37,383 INFO L241 Difference]: Finished difference. Result has 22 places, 16 transitions, 45 flow [2021-03-11 22:32:37,383 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2021-03-11 22:32:37,384 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2021-03-11 22:32:37,384 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 45 flow [2021-03-11 22:32:37,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,384 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:32:37,385 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:32:37,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:32:37,385 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 22:32:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:32:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1115014924, now seen corresponding path program 1 times [2021-03-11 22:32:37,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:32:37,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596305691] [2021-03-11 22:32:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:32:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:32:37,444 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,445 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:32:37,453 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,454 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:32:37,457 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:32:37,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:32:37,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:32:37,466 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-11 22:32:37,468 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 22:32:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:32:37,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596305691] [2021-03-11 22:32:37,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:32:37,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 22:32:37,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490261255] [2021-03-11 22:32:37,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:32:37,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:32:37,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:32:37,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:32:37,475 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 56 [2021-03-11 22:32:37,475 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 45 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,475 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:32:37,476 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 56 [2021-03-11 22:32:37,476 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:32:37,498 INFO L129 PetriNetUnfolder]: 20/55 cut-off events. [2021-03-11 22:32:37,499 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:32:37,500 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 55 events. 20/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 195 event pairs, 17 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 85. Up to 33 conditions per place. [2021-03-11 22:32:37,501 INFO L132 encePairwiseOnDemand]: 54/56 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2021-03-11 22:32:37,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 53 flow [2021-03-11 22:32:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:32:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:32:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2021-03-11 22:32:37,503 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.625 [2021-03-11 22:32:37,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 105 transitions. [2021-03-11 22:32:37,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 105 transitions. [2021-03-11 22:32:37,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:32:37,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 105 transitions. [2021-03-11 22:32:37,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,505 INFO L185 Difference]: Start difference. First operand has 22 places, 16 transitions, 45 flow. Second operand 3 states and 105 transitions. [2021-03-11 22:32:37,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 53 flow [2021-03-11 22:32:37,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 52 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 22:32:37,506 INFO L241 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2021-03-11 22:32:37,507 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2021-03-11 22:32:37,507 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2021-03-11 22:32:37,507 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2021-03-11 22:32:37,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:32:37,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 22:32:37,511 INFO L202 PluginConnector]: Adding new model sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:32:37 BasicIcfg [2021-03-11 22:32:37,511 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:32:37,513 INFO L168 Benchmark]: Toolchain (without parser) took 1198.98 ms. Allocated memory is still 415.2 MB. Free memory was 395.9 MB in the beginning and 325.2 MB in the end (delta: 70.7 MB). Peak memory consumption was 71.9 MB. Max. memory is 16.0 GB. [2021-03-11 22:32:37,513 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 415.2 MB. Free memory was 396.9 MB in the beginning and 396.8 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:32:37,514 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.99 ms. Allocated memory is still 415.2 MB. Free memory was 395.4 MB in the beginning and 393.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:32:37,515 INFO L168 Benchmark]: Boogie Preprocessor took 14.35 ms. Allocated memory is still 415.2 MB. Free memory was 393.9 MB in the beginning and 393.1 MB in the end (delta: 807.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:32:37,519 INFO L168 Benchmark]: RCFGBuilder took 155.03 ms. Allocated memory is still 415.2 MB. Free memory was 393.0 MB in the beginning and 384.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-11 22:32:37,520 INFO L168 Benchmark]: TraceAbstraction took 993.50 ms. Allocated memory is still 415.2 MB. Free memory was 383.7 MB in the beginning and 325.2 MB in the end (delta: 58.6 MB). Peak memory consumption was 59.4 MB. Max. memory is 16.0 GB. [2021-03-11 22:32:37,523 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 0.13 ms. Allocated memory is still 415.2 MB. Free memory was 396.9 MB in the beginning and 396.8 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.99 ms. Allocated memory is still 415.2 MB. Free memory was 395.4 MB in the beginning and 393.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.35 ms. Allocated memory is still 415.2 MB. Free memory was 393.9 MB in the beginning and 393.1 MB in the end (delta: 807.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 155.03 ms. Allocated memory is still 415.2 MB. Free memory was 393.0 MB in the beginning and 384.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 993.50 ms. Allocated memory is still 415.2 MB. Free memory was 383.7 MB in the beginning and 325.2 MB in the end (delta: 58.6 MB). Peak memory consumption was 59.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 419.8ms, 39 PlacesBefore, 27 PlacesAfterwards, 38 TransitionsBefore, 26 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 12 TotalNumberOfCompositions, 986 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 986, positive: 986, positive conditional: 0, positive unconditional: 986, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 321, positive: 321, positive conditional: 0, positive unconditional: 321, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 321, positive: 279, positive conditional: 0, positive unconditional: 279, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 42, positive: 42, positive conditional: 0, positive unconditional: 42, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 216, positive: 216, positive conditional: 0, positive unconditional: 216, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 986, positive: 665, positive conditional: 0, positive unconditional: 665, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 321, unknown conditional: 0, unknown unconditional: 321] , Statistics on independence cache: Total cache size (in pairs): 54, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 45]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 10.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 892.8ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 112.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 509.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 6 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=0, InterpolantAutomatonStates: 9, 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: 7.0ms SsaConstructionTime, 27.6ms SatisfiabilityAnalysisTime, 120.0ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...