/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-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:19:43,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:19:43,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:19:43,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-24 22:19:43,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-24 22:19:43,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-24 22:19:43,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-24 22:19:43,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-24 22:19:43,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-24 22:19:43,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-24 22:19:43,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-24 22:19:43,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-24 22:19:43,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 22:19:43,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 22:19:43,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 22:19:43,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 22:19:43,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 22:19:43,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 22:19:43,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 22:19:43,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 22:19:43,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 22:19:43,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 22:19:43,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 22:19:43,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 22:19:43,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 22:19:43,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 22:19:43,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 22:19:43,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 22:19:43,919 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 [2021-03-24 22:19:43,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:19:43,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:19:43,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:19:43,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:19:43,961 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:19:43,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:19:43,961 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:19:43,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:19:43,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:19:43,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:19:43,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:19:43,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:19:43,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:19:43,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:19:43,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:19:43,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:19:43,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:19:43,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:19:43,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:19:43,963 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:19:43,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:19:43,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:19:43,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:19:43,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:19:43,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:19:43,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:19:43,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:19:43,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:19:43,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:19:44,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:19:44,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:19:44,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:19:44,292 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:19:44,293 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:19:44,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/sum_invariant.bpl [2021-03-24 22:19:44,294 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/sum_invariant.bpl' [2021-03-24 22:19:44,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:19:44,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:19:44,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:19:44,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:19:44,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:19:44,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:19:44,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:19:44,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:19:44,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:19:44,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/1) ... [2021-03-24 22:19:44,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:19:44,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:19:44,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:19:44,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:19:44,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (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 [2021-03-24 22:19:44,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:19:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:19:44,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:19:44,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-03-24 22:19:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-03-24 22:19:44,427 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-03-24 22:19:44,427 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 22:19:44,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:19:44,551 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:19:44,552 INFO L202 PluginConnector]: Adding new model sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:19:44 BoogieIcfgContainer [2021-03-24 22:19:44,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:19:44,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:19:44,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:19:44,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:19:44,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:44" (1/2) ... [2021-03-24 22:19:44,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6d0180 and model type sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:19:44, skipping insertion in model container [2021-03-24 22:19:44,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:19:44" (2/2) ... [2021-03-24 22:19:44,559 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_invariant.bpl [2021-03-24 22:19:44,567 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:19:44,570 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 22:19:44,571 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:19:44,618 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,618 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,619 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,619 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,620 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,621 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,623 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,623 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,624 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,624 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,625 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,625 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,627 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,628 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,628 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,628 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,629 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,629 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,630 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,630 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,630 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,630 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,631 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,631 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,635 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,652 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,654 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork2_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,656 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork3_t not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:44,697 INFO L149 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2021-03-24 22:19:44,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-24 22:19:44,755 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:19:44,755 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:19:44,755 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:19:44,755 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:19:44,756 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:19:44,756 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:19:44,756 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:19:44,756 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:19:44,778 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 45 places, 44 transitions, 156 flow [2021-03-24 22:19:44,806 INFO L129 PetriNetUnfolder]: 17/56 cut-off events. [2021-03-24 22:19:44,806 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 22:19:44,809 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. [2021-03-24 22:19:44,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 44 transitions, 156 flow [2021-03-24 22:19:44,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 136 flow [2021-03-24 22:19:44,815 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:19:44,832 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 39 places, 38 transitions, 136 flow [2021-03-24 22:19:44,839 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 39 places, 38 transitions, 136 flow [2021-03-24 22:19:44,840 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 39 places, 38 transitions, 136 flow [2021-03-24 22:19:44,868 INFO L129 PetriNetUnfolder]: 17/54 cut-off events. [2021-03-24 22:19:44,868 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 22:19:44,869 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. [2021-03-24 22:19:44,871 INFO L142 LiptonReduction]: Number of co-enabled transitions 528 [2021-03-24 22:19:45,279 INFO L154 LiptonReduction]: Checked pairs total: 225 [2021-03-24 22:19:45,280 INFO L156 LiptonReduction]: Total number of compositions: 11 [2021-03-24 22:19:45,282 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 468 [2021-03-24 22:19:45,306 INFO L129 PetriNetUnfolder]: 17/42 cut-off events. [2021-03-24 22:19:45,306 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-03-24 22:19:45,306 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:45,307 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:45,307 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1424014088, now seen corresponding path program 1 times [2021-03-24 22:19:45,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:45,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54820119] [2021-03-24 22:19:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:45,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:19:45,482 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,482 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:45,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,505 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:19:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:45,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54820119] [2021-03-24 22:19:45,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:45,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:19:45,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300543554] [2021-03-24 22:19:45,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:45,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:45,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:45,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:45,526 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 55 [2021-03-24 22:19:45,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:19:45,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:45,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 55 [2021-03-24 22:19:45,529 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:45,543 INFO L129 PetriNetUnfolder]: 5/24 cut-off events. [2021-03-24 22:19:45,543 INFO L130 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2021-03-24 22:19:45,544 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 24 events. 5/24 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. 7/31 useless extension candidates. Maximal degree in co-relation 29. Up to 6 conditions per place. [2021-03-24 22:19:45,545 INFO L132 encePairwiseOnDemand]: 51/55 looper letters, 1 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2021-03-24 22:19:45,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 88 flow [2021-03-24 22:19:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:45,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2021-03-24 22:19:45,555 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9393939393939394 [2021-03-24 22:19:45,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2021-03-24 22:19:45,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2021-03-24 22:19:45,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:45,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2021-03-24 22:19:45,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2021-03-24 22:19:45,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-03-24 22:19:45,565 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-03-24 22:19:45,566 INFO L185 Difference]: Start difference. First operand has 28 places, 27 transitions, 114 flow. Second operand 3 states and 155 transitions. [2021-03-24 22:19:45,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 88 flow [2021-03-24 22:19:45,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 60 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-03-24 22:19:45,571 INFO L241 Difference]: Finished difference. Result has 22 places, 21 transitions, 58 flow [2021-03-24 22:19:45,573 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2021-03-24 22:19:45,573 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2021-03-24 22:19:45,573 INFO L480 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 58 flow [2021-03-24 22:19:45,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:19:45,574 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:45,574 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:45,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:19:45,574 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash 112666674, now seen corresponding path program 1 times [2021-03-24 22:19:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:45,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324340921] [2021-03-24 22:19:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:45,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:19:45,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:45,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:19:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324340921] [2021-03-24 22:19:45,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:45,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:19:45,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840637826] [2021-03-24 22:19:45,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:45,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:45,598 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 55 [2021-03-24 22:19:45,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:19:45,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:45,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 55 [2021-03-24 22:19:45,599 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:45,605 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-03-24 22:19:45,606 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-03-24 22:19:45,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 17 events. 1/17 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 13. Up to 2 conditions per place. [2021-03-24 22:19:45,606 INFO L132 encePairwiseOnDemand]: 52/55 looper letters, 1 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2021-03-24 22:19:45,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 50 flow [2021-03-24 22:19:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:45,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2021-03-24 22:19:45,608 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2021-03-24 22:19:45,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2021-03-24 22:19:45,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2021-03-24 22:19:45,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:45,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2021-03-24 22:19:45,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2021-03-24 22:19:45,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-03-24 22:19:45,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-03-24 22:19:45,611 INFO L185 Difference]: Start difference. First operand has 22 places, 21 transitions, 58 flow. Second operand 3 states and 154 transitions. [2021-03-24 22:19:45,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 50 flow [2021-03-24 22:19:45,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 49 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 22:19:45,612 INFO L241 Difference]: Finished difference. Result has 23 places, 17 transitions, 47 flow [2021-03-24 22:19:45,612 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2021-03-24 22:19:45,613 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2021-03-24 22:19:45,613 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 47 flow [2021-03-24 22:19:45,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2021-03-24 22:19:45,613 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:45,613 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:19:45,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:19:45,614 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1603655192, now seen corresponding path program 1 times [2021-03-24 22:19:45,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:45,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724579470] [2021-03-24 22:19:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:45,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:45,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:45,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:45,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:45,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 22:19:45,659 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-03-24 22:19:45,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-24 22:19:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:45,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724579470] [2021-03-24 22:19:45,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:45,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 22:19:45,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463101805] [2021-03-24 22:19:45,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:19:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:19:45,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:19:45,665 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 55 [2021-03-24 22:19:45,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 47 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) [2021-03-24 22:19:45,666 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:19:45,666 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 55 [2021-03-24 22:19:45,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:19:45,677 INFO L129 PetriNetUnfolder]: 20/56 cut-off events. [2021-03-24 22:19:45,678 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 22:19:45,678 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 56 events. 20/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 197 event pairs, 17 based on Foata normal form. 1/53 useless extension candidates. Maximal degree in co-relation 86. Up to 33 conditions per place. [2021-03-24 22:19:45,678 INFO L132 encePairwiseOnDemand]: 53/55 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2021-03-24 22:19:45,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 16 transitions, 55 flow [2021-03-24 22:19:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:19:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:19:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2021-03-24 22:19:45,680 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2021-03-24 22:19:45,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 105 transitions. [2021-03-24 22:19:45,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 105 transitions. [2021-03-24 22:19:45,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:19:45,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 105 transitions. [2021-03-24 22:19:45,681 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) [2021-03-24 22:19:45,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-03-24 22:19:45,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2021-03-24 22:19:45,682 INFO L185 Difference]: Start difference. First operand has 23 places, 17 transitions, 47 flow. Second operand 3 states and 105 transitions. [2021-03-24 22:19:45,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 16 transitions, 55 flow [2021-03-24 22:19:45,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 16 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 22:19:45,683 INFO L241 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2021-03-24 22:19:45,683 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2021-03-24 22:19:45,683 INFO L343 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2021-03-24 22:19:45,683 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2021-03-24 22:19:45,683 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) [2021-03-24 22:19:45,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 22:19:45,687 INFO L202 PluginConnector]: Adding new model sum_invariant.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:19:45 BasicIcfg [2021-03-24 22:19:45,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:19:45,688 INFO L168 Benchmark]: Toolchain (without parser) took 1364.91 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 236.7 MB in the beginning and 309.0 MB in the end (delta: -72.3 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.0 GB. [2021-03-24 22:19:45,688 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:19:45,689 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 22:19:45,689 INFO L168 Benchmark]: Boogie Preprocessor took 10.60 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 878.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:19:45,690 INFO L168 Benchmark]: RCFGBuilder took 196.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 225.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-24 22:19:45,690 INFO L168 Benchmark]: TraceAbstraction took 1132.48 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 225.2 MB in the beginning and 309.0 MB in the end (delta: -83.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.0 GB. [2021-03-24 22:19:45,692 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.60 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.3 MB in the end (delta: 878.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 196.43 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 225.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1132.48 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 225.2 MB in the beginning and 309.0 MB in the end (delta: -83.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 440.7ms, 39 PlacesBefore, 28 PlacesAfterwards, 38 TransitionsBefore, 27 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 11 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 225 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 225, positive: 225, positive conditional: 0, positive unconditional: 225, 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: 225, positive: 225, positive conditional: 0, positive unconditional: 225, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 225, positive: 225, positive conditional: 0, positive unconditional: 225, 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: 225, positive: 180, positive conditional: 0, positive unconditional: 180, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 45, positive conditional: 0, positive unconditional: 45, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 237, positive: 237, positive conditional: 0, positive unconditional: 237, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 225, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 225, unknown conditional: 0, unknown unconditional: 225] , 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: 45]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 932.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 86.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 541.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 6 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred 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: 4.8ms SsaConstructionTime, 37.9ms SatisfiabilityAnalysisTime, 103.1ms InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 142 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...