/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/POPL2022/add-sub02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8b99979fc9bd30b823d307a67cb055caa4790482-8b99979 [2021-06-30 12:55:22,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-30 12:55:22,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-30 12:55:22,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-30 12:55:22,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-30 12:55:22,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-30 12:55:22,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-30 12:55:22,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-30 12:55:22,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-30 12:55:22,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-30 12:55:22,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-30 12:55:22,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-30 12:55:22,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-30 12:55:22,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-30 12:55:22,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-30 12:55:22,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-30 12:55:22,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-30 12:55:22,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-30 12:55:22,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-30 12:55:22,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-30 12:55:22,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-30 12:55:22,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-30 12:55:22,650 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-30 12:55:22,651 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-30 12:55:22,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-30 12:55:22,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-30 12:55:22,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-30 12:55:22,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-30 12:55:22,657 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-30 12:55:22,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-30 12:55:22,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-30 12:55:22,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-30 12:55:22,659 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-30 12:55:22,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-30 12:55:22,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-30 12:55:22,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-30 12:55:22,661 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-NoLbe.epf [2021-06-30 12:55:22,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-30 12:55:22,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-30 12:55:22,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-30 12:55:22,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-30 12:55:22,886 INFO L138 SettingsManager]: * Use SBE=true [2021-06-30 12:55:22,886 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-30 12:55:22,886 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-30 12:55:22,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-30 12:55:22,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-30 12:55:22,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-30 12:55:22,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-30 12:55:22,887 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-30 12:55:22,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-30 12:55:22,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-30 12:55:22,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-30 12:55:22,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-30 12:55:22,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-30 12:55:22,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-30 12:55:22,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-30 12:55:22,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-30 12:55:22,889 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-30 12:55:22,889 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-30 12:55:22,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-30 12:55:23,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-30 12:55:23,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-30 12:55:23,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-30 12:55:23,176 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-30 12:55:23,178 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-30 12:55:23,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub02.bpl [2021-06-30 12:55:23,226 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/POPL2022/add-sub02.bpl' [2021-06-30 12:55:23,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-30 12:55:23,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-30 12:55:23,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-30 12:55:23,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-30 12:55:23,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-30 12:55:23,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-30 12:55:23,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-30 12:55:23,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-30 12:55:23,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-30 12:55:23,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,333 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/1) ... [2021-06-30 12:55:23,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-30 12:55:23,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-30 12:55:23,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-30 12:55:23,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-30 12:55:23,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (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 [2021-06-30 12:55:23,382 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-30 12:55:23,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-30 12:55:23,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-30 12:55:23,383 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Thread given in one single declaration [2021-06-30 12:55:23,383 INFO L130 BoogieDeclarations]: Found specification of procedure Thread [2021-06-30 12:55:23,383 INFO L138 BoogieDeclarations]: Found implementation of procedure Thread [2021-06-30 12:55:23,384 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-30 12:55:23,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-30 12:55:23,480 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-30 12:55:23,481 INFO L202 PluginConnector]: Adding new model add-sub02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 12:55:23 BoogieIcfgContainer [2021-06-30 12:55:23,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-30 12:55:23,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-30 12:55:23,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-30 12:55:23,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-30 12:55:23,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.06 12:55:23" (1/2) ... [2021-06-30 12:55:23,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efd698a and model type add-sub02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.06 12:55:23, skipping insertion in model container [2021-06-30 12:55:23,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "add-sub02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.06 12:55:23" (2/2) ... [2021-06-30 12:55:23,487 INFO L111 eAbstractionObserver]: Analyzing ICFG add-sub02.bpl [2021-06-30 12:55:23,490 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-30 12:55:23,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-30 12:55:23,491 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-30 12:55:23,506 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,507 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,508 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,508 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,509 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,510 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,511 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,512 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,512 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,513 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,513 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,514 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,515 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,518 WARN L313 ript$VariableManager]: TermVariabe ThreadThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-30 12:55:23,522 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-30 12:55:23,539 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-30 12:55:23,553 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-30 12:55:23,554 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-30 12:55:23,554 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-30 12:55:23,554 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-30 12:55:23,554 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-30 12:55:23,554 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-30 12:55:23,554 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-30 12:55:23,554 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-30 12:55:23,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 23 places, 18 transitions, 52 flow [2021-06-30 12:55:23,573 INFO L129 PetriNetUnfolder]: 2/16 cut-off events. [2021-06-30 12:55:23,573 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-30 12:55:23,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2021-06-30 12:55:23,576 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 18 transitions, 52 flow [2021-06-30 12:55:23,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 14 transitions, 40 flow [2021-06-30 12:55:23,582 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2021-06-30 12:55:23,582 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-30 12:55:23,582 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-30 12:55:23,583 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:55:23,583 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 12:55:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:55:23,587 INFO L82 PathProgramCache]: Analyzing trace with hash 879787068, now seen corresponding path program 1 times [2021-06-30 12:55:23,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:55:23,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608200260] [2021-06-30 12:55:23,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:55:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:55:23,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:23,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-30 12:55:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-30 12:55:23,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:55:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608200260] [2021-06-30 12:55:23,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608200260] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:55:23,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:55:23,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-30 12:55:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922053120] [2021-06-30 12:55:23,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-30 12:55:23,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:55:23,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-30 12:55:23,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-30 12:55:23,722 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 18 [2021-06-30 12:55:23,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2021-06-30 12:55:23,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-30 12:55:23,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 18 [2021-06-30 12:55:23,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-30 12:55:23,806 INFO L129 PetriNetUnfolder]: 9/33 cut-off events. [2021-06-30 12:55:23,806 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-30 12:55:23,806 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 33 events. 9/33 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 69 event pairs, 0 based on Foata normal form. 1/29 useless extension candidates. Maximal degree in co-relation 42. Up to 16 conditions per place. [2021-06-30 12:55:23,808 INFO L132 encePairwiseOnDemand]: 14/18 looper letters, 5 selfloop transitions, 3 changer transitions 0/16 dead transitions. [2021-06-30 12:55:23,808 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 16 transitions, 60 flow [2021-06-30 12:55:23,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-30 12:55:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-30 12:55:23,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2021-06-30 12:55:23,816 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2021-06-30 12:55:23,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2021-06-30 12:55:23,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2021-06-30 12:55:23,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-30 12:55:23,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2021-06-30 12:55:23,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-06-30 12:55:23,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-06-30 12:55:23,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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) [2021-06-30 12:55:23,962 INFO L185 Difference]: Start difference. First operand has 19 places, 14 transitions, 40 flow. Second operand 3 states and 42 transitions. [2021-06-30 12:55:23,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 16 transitions, 60 flow [2021-06-30 12:55:23,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 16 transitions, 52 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-30 12:55:23,968 INFO L241 Difference]: Finished difference. Result has 18 places, 16 transitions, 51 flow [2021-06-30 12:55:23,969 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2021-06-30 12:55:23,970 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2021-06-30 12:55:23,970 INFO L482 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 51 flow [2021-06-30 12:55:23,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2021-06-30 12:55:23,971 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-30 12:55:23,971 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:55:23,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-30 12:55:23,971 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 12:55:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:55:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash 781559954, now seen corresponding path program 1 times [2021-06-30 12:55:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:55:23,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191528859] [2021-06-30 12:55:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:55:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:55:24,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,028 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,045 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-30 12:55:24,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-30 12:55:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:55:24,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:55:24,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191528859] [2021-06-30 12:55:24,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191528859] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:55:24,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:55:24,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 12:55:24,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209854271] [2021-06-30 12:55:24,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 12:55:24,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:55:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 12:55:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 12:55:24,055 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 18 [2021-06-30 12:55:24,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 51 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-06-30 12:55:24,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-30 12:55:24,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 18 [2021-06-30 12:55:24,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-30 12:55:24,093 INFO L129 PetriNetUnfolder]: 12/41 cut-off events. [2021-06-30 12:55:24,093 INFO L130 PetriNetUnfolder]: For 11/14 co-relation queries the response was YES. [2021-06-30 12:55:24,094 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 41 events. 12/41 cut-off events. For 11/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 99 event pairs, 0 based on Foata normal form. 3/39 useless extension candidates. Maximal degree in co-relation 69. Up to 19 conditions per place. [2021-06-30 12:55:24,094 INFO L132 encePairwiseOnDemand]: 13/18 looper letters, 8 selfloop transitions, 7 changer transitions 0/21 dead transitions. [2021-06-30 12:55:24,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 97 flow [2021-06-30 12:55:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 12:55:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-30 12:55:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2021-06-30 12:55:24,097 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2021-06-30 12:55:24,097 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 50 transitions. [2021-06-30 12:55:24,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 50 transitions. [2021-06-30 12:55:24,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-30 12:55:24,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 50 transitions. [2021-06-30 12:55:24,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2021-06-30 12:55:24,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:55:24,098 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:55:24,098 INFO L185 Difference]: Start difference. First operand has 18 places, 16 transitions, 51 flow. Second operand 4 states and 50 transitions. [2021-06-30 12:55:24,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 97 flow [2021-06-30 12:55:24,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-30 12:55:24,100 INFO L241 Difference]: Finished difference. Result has 22 places, 20 transitions, 94 flow [2021-06-30 12:55:24,100 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2021-06-30 12:55:24,101 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 3 predicate places. [2021-06-30 12:55:24,101 INFO L482 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 94 flow [2021-06-30 12:55:24,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-06-30 12:55:24,101 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-30 12:55:24,101 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:55:24,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-30 12:55:24,101 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 12:55:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:55:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1618218498, now seen corresponding path program 1 times [2021-06-30 12:55:24,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:55:24,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893089869] [2021-06-30 12:55:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:55:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:55:24,123 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,135 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,135 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,142 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-30 12:55:24,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-30 12:55:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-30 12:55:24,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:55:24,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893089869] [2021-06-30 12:55:24,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893089869] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:55:24,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:55:24,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-30 12:55:24,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816712648] [2021-06-30 12:55:24,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-30 12:55:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:55:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-30 12:55:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-30 12:55:24,147 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 18 [2021-06-30 12:55:24,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-06-30 12:55:24,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-30 12:55:24,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 18 [2021-06-30 12:55:24,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-30 12:55:24,190 INFO L129 PetriNetUnfolder]: 19/58 cut-off events. [2021-06-30 12:55:24,190 INFO L130 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2021-06-30 12:55:24,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 58 events. 19/58 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 161 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 116. Up to 32 conditions per place. [2021-06-30 12:55:24,191 INFO L132 encePairwiseOnDemand]: 13/18 looper letters, 13 selfloop transitions, 7 changer transitions 0/26 dead transitions. [2021-06-30 12:55:24,191 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 26 transitions, 159 flow [2021-06-30 12:55:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-30 12:55:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-30 12:55:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 51 transitions. [2021-06-30 12:55:24,194 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2021-06-30 12:55:24,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 51 transitions. [2021-06-30 12:55:24,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 51 transitions. [2021-06-30 12:55:24,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-30 12:55:24,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 51 transitions. [2021-06-30 12:55:24,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-06-30 12:55:24,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:55:24,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-30 12:55:24,195 INFO L185 Difference]: Start difference. First operand has 22 places, 20 transitions, 94 flow. Second operand 4 states and 51 transitions. [2021-06-30 12:55:24,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 26 transitions, 159 flow [2021-06-30 12:55:24,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 157 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-06-30 12:55:24,201 INFO L241 Difference]: Finished difference. Result has 27 places, 24 transitions, 144 flow [2021-06-30 12:55:24,201 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2021-06-30 12:55:24,202 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2021-06-30 12:55:24,202 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 144 flow [2021-06-30 12:55:24,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2021-06-30 12:55:24,202 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-30 12:55:24,202 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:55:24,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-30 12:55:24,203 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 12:55:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:55:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash -699149226, now seen corresponding path program 1 times [2021-06-30 12:55:24,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:55:24,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409202357] [2021-06-30 12:55:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:55:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:55:24,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,247 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,253 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,254 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,279 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-30 12:55:24,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-30 12:55:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:55:24,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:55:24,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409202357] [2021-06-30 12:55:24,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409202357] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:55:24,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:55:24,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 12:55:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272526197] [2021-06-30 12:55:24,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 12:55:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:55:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 12:55:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 12:55:24,288 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 18 [2021-06-30 12:55:24,289 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-30 12:55:24,289 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-30 12:55:24,289 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 18 [2021-06-30 12:55:24,289 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-30 12:55:24,340 INFO L129 PetriNetUnfolder]: 39/100 cut-off events. [2021-06-30 12:55:24,341 INFO L130 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2021-06-30 12:55:24,341 INFO L84 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 100 events. 39/100 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 310 event pairs, 14 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 217. Up to 33 conditions per place. [2021-06-30 12:55:24,342 INFO L132 encePairwiseOnDemand]: 12/18 looper letters, 14 selfloop transitions, 17 changer transitions 0/35 dead transitions. [2021-06-30 12:55:24,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 257 flow [2021-06-30 12:55:24,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 12:55:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-30 12:55:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2021-06-30 12:55:24,344 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2021-06-30 12:55:24,344 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2021-06-30 12:55:24,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2021-06-30 12:55:24,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-30 12:55:24,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2021-06-30 12:55:24,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-06-30 12:55:24,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-06-30 12:55:24,346 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-06-30 12:55:24,346 INFO L185 Difference]: Start difference. First operand has 27 places, 24 transitions, 144 flow. Second operand 5 states and 57 transitions. [2021-06-30 12:55:24,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 257 flow [2021-06-30 12:55:24,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 253 flow, removed 2 selfloop flow, removed 0 redundant places. [2021-06-30 12:55:24,349 INFO L241 Difference]: Finished difference. Result has 34 places, 30 transitions, 253 flow [2021-06-30 12:55:24,349 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=253, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2021-06-30 12:55:24,349 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 15 predicate places. [2021-06-30 12:55:24,349 INFO L482 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 253 flow [2021-06-30 12:55:24,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-30 12:55:24,349 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-30 12:55:24,350 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:55:24,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-30 12:55:24,350 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 12:55:24,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:55:24,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1773492544, now seen corresponding path program 2 times [2021-06-30 12:55:24,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:55:24,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147992583] [2021-06-30 12:55:24,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:55:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:55:24,384 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,384 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,428 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,429 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-30 12:55:24,437 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,441 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,443 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-30 12:55:24,443 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-30 12:55:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:55:24,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:55:24,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147992583] [2021-06-30 12:55:24,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147992583] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:55:24,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:55:24,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-30 12:55:24,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443950594] [2021-06-30 12:55:24,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-30 12:55:24,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:55:24,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-30 12:55:24,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-30 12:55:24,448 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 18 [2021-06-30 12:55:24,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 253 flow. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-30 12:55:24,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-30 12:55:24,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 18 [2021-06-30 12:55:24,448 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-30 12:55:24,493 INFO L129 PetriNetUnfolder]: 46/118 cut-off events. [2021-06-30 12:55:24,493 INFO L130 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2021-06-30 12:55:24,494 INFO L84 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 118 events. 46/118 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 409 event pairs, 10 based on Foata normal form. 1/119 useless extension candidates. Maximal degree in co-relation 336. Up to 55 conditions per place. [2021-06-30 12:55:24,496 INFO L132 encePairwiseOnDemand]: 12/18 looper letters, 23 selfloop transitions, 13 changer transitions 0/40 dead transitions. [2021-06-30 12:55:24,496 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 382 flow [2021-06-30 12:55:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-30 12:55:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-06-30 12:55:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2021-06-30 12:55:24,497 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2021-06-30 12:55:24,497 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2021-06-30 12:55:24,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2021-06-30 12:55:24,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-30 12:55:24,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2021-06-30 12:55:24,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-06-30 12:55:24,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-06-30 12:55:24,500 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2021-06-30 12:55:24,500 INFO L185 Difference]: Start difference. First operand has 34 places, 30 transitions, 253 flow. Second operand 5 states and 56 transitions. [2021-06-30 12:55:24,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 382 flow [2021-06-30 12:55:24,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 354 flow, removed 14 selfloop flow, removed 0 redundant places. [2021-06-30 12:55:24,504 INFO L241 Difference]: Finished difference. Result has 40 places, 36 transitions, 322 flow [2021-06-30 12:55:24,504 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2021-06-30 12:55:24,504 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 21 predicate places. [2021-06-30 12:55:24,504 INFO L482 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 322 flow [2021-06-30 12:55:24,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-06-30 12:55:24,505 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-30 12:55:24,505 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-30 12:55:24,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-30 12:55:24,505 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-30 12:55:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-30 12:55:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 910131318, now seen corresponding path program 3 times [2021-06-30 12:55:24,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-30 12:55:24,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733375617] [2021-06-30 12:55:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-30 12:55:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-30 12:55:24,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,534 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,534 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,542 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,543 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-30 12:55:24,550 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-30 12:55:24,551 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-30 12:55:24,559 INFO L142 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-06-30 12:55:24,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-30 12:55:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-30 12:55:24,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-30 12:55:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733375617] [2021-06-30 12:55:24,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733375617] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-30 12:55:24,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-30 12:55:24,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-30 12:55:24,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053707204] [2021-06-30 12:55:24,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-30 12:55:24,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-30 12:55:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-30 12:55:24,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-30 12:55:24,564 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 18 [2021-06-30 12:55:24,564 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 322 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-06-30 12:55:24,564 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-30 12:55:24,564 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 18 [2021-06-30 12:55:24,564 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-30 12:55:24,627 INFO L129 PetriNetUnfolder]: 46/116 cut-off events. [2021-06-30 12:55:24,627 INFO L130 PetriNetUnfolder]: For 403/403 co-relation queries the response was YES. [2021-06-30 12:55:24,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 116 events. 46/116 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 408 event pairs, 12 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 354. Up to 47 conditions per place. [2021-06-30 12:55:24,629 INFO L132 encePairwiseOnDemand]: 12/18 looper letters, 0 selfloop transitions, 0 changer transitions 42/42 dead transitions. [2021-06-30 12:55:24,629 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 425 flow [2021-06-30 12:55:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-30 12:55:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-30 12:55:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 59 transitions. [2021-06-30 12:55:24,635 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2021-06-30 12:55:24,635 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 59 transitions. [2021-06-30 12:55:24,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 59 transitions. [2021-06-30 12:55:24,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-30 12:55:24,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 59 transitions. [2021-06-30 12:55:24,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 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) [2021-06-30 12:55:24,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2021-06-30 12:55:24,637 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 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) [2021-06-30 12:55:24,637 INFO L185 Difference]: Start difference. First operand has 40 places, 36 transitions, 322 flow. Second operand 6 states and 59 transitions. [2021-06-30 12:55:24,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 425 flow [2021-06-30 12:55:24,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 380 flow, removed 16 selfloop flow, removed 1 redundant places. [2021-06-30 12:55:24,641 INFO L241 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2021-06-30 12:55:24,642 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2021-06-30 12:55:24,642 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 24 predicate places. [2021-06-30 12:55:24,642 INFO L482 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2021-06-30 12:55:24,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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) [2021-06-30 12:55:24,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-30 12:55:24,644 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-30 12:55:24,646 INFO L202 PluginConnector]: Adding new model add-sub02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.06 12:55:24 BasicIcfg [2021-06-30 12:55:24,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-30 12:55:24,647 INFO L168 Benchmark]: Toolchain (without parser) took 1346.55 ms. Allocated memory is still 207.6 MB. Free memory was 188.2 MB in the beginning and 112.7 MB in the end (delta: 75.5 MB). Peak memory consumption was 78.1 MB. Max. memory is 8.0 GB. [2021-06-30 12:55:24,647 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 207.6 MB. Free memory is still 189.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-30 12:55:24,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.87 ms. Allocated memory is still 207.6 MB. Free memory was 188.1 MB in the beginning and 186.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-06-30 12:55:24,648 INFO L168 Benchmark]: Boogie Preprocessor took 14.07 ms. Allocated memory is still 207.6 MB. Free memory was 186.7 MB in the beginning and 185.8 MB in the end (delta: 843.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-30 12:55:24,648 INFO L168 Benchmark]: RCFGBuilder took 147.16 ms. Allocated memory is still 207.6 MB. Free memory was 185.7 MB in the beginning and 177.0 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-06-30 12:55:24,649 INFO L168 Benchmark]: TraceAbstraction took 1163.51 ms. Allocated memory is still 207.6 MB. Free memory was 176.6 MB in the beginning and 112.7 MB in the end (delta: 63.9 MB). Peak memory consumption was 65.5 MB. Max. memory is 8.0 GB. [2021-06-30 12:55:24,650 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 0.09 ms. Allocated memory is still 207.6 MB. Free memory is still 189.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.87 ms. Allocated memory is still 207.6 MB. Free memory was 188.1 MB in the beginning and 186.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.07 ms. Allocated memory is still 207.6 MB. Free memory was 186.7 MB in the beginning and 185.8 MB in the end (delta: 843.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 147.16 ms. Allocated memory is still 207.6 MB. Free memory was 185.7 MB in the beginning and 177.0 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1163.51 ms. Allocated memory is still 207.6 MB. Free memory was 176.6 MB in the beginning and 112.7 MB in the end (delta: 63.9 MB). Peak memory consumption was 65.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 4 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 1092.1ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 553.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 41 SDtfs, 8 SDslu, 22 SDs, 0 SdLazy, 166 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 152.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 160.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=322occurred in iteration=5, InterpolantAutomatonStates: 27, 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: 13.7ms SsaConstructionTime, 33.3ms SatisfiabilityAnalysisTime, 364.2ms InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 8/8 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...