/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/regression/showcase/Peterson.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 22:34:50,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 22:34:50,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 22:34:50,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 22:34:50,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 22:34:50,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 22:34:50,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 22:34:50,608 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 22:34:50,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 22:34:50,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 22:34:50,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 22:34:50,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 22:34:50,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 22:34:50,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 22:34:50,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 22:34:50,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 22:34:50,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 22:34:50,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 22:34:50,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 22:34:50,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 22:34:50,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 22:34:50,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 22:34:50,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 22:34:50,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 22:34:50,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 22:34:50,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 22:34:50,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 22:34:50,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 22:34:50,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 22:34:50,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 22:34:50,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 22:34:50,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 22:34:50,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 22:34:50,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 22:34:50,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 22:34:50,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 22:34:50,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 22:34:50,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 22:34:50,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 22:34:50,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 22:34:50,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 22:34:50,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 22:34:50,689 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 22:34:50,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 22:34:50,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 22:34:50,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 22:34:50,693 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 22:34:50,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 22:34:50,693 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 22:34:50,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 22:34:50,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 22:34:50,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 22:34:50,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 22:34:50,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 22:34:50,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 22:34:50,695 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 22:34:50,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 22:34:50,695 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 22:34:50,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 22:34:50,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 22:34:50,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 22:34:50,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 22:34:50,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 22:34:50,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:34:50,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 22:34:50,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 22:34:50,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 22:34:50,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 22:34:50,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 22:34:50,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 22:34:50,697 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 22:34:51,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 22:34:51,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 22:34:51,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 22:34:51,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 22:34:51,061 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 22:34:51,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl [2021-03-11 22:34:51,062 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Peterson.bpl' [2021-03-11 22:34:51,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 22:34:51,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 22:34:51,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:51,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 22:34:51,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 22:34:51,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 22:34:51,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 22:34:51,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 22:34:51,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 22:34:51,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... [2021-03-11 22:34:51,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 22:34:51,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 22:34:51,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 22:34:51,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 22:34:51,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 22:34:51,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-03-11 22:34:51,518 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-03-11 22:34:51,518 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-03-11 22:34:51,520 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-03-11 22:34:51,520 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-03-11 22:34:51,520 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-03-11 22:34:51,520 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 22:34:51,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 22:34:51,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 22:34:51,521 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 22:34:51,653 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 22:34:51,653 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-11 22:34:51,654 INFO L202 PluginConnector]: Adding new model Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:51 BoogieIcfgContainer [2021-03-11 22:34:51,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 22:34:51,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 22:34:51,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 22:34:51,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 22:34:51,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Peterson.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 10:34:51" (1/2) ... [2021-03-11 22:34:51,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26aa7c60 and model type Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 10:34:51, skipping insertion in model container [2021-03-11 22:34:51,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 10:34:51" (2/2) ... [2021-03-11 22:34:51,672 INFO L111 eAbstractionObserver]: Analyzing ICFG Peterson.bpl [2021-03-11 22:34:51,676 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 22:34:51,679 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-11 22:34:51,680 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 22:34:51,702 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:51,702 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:51,706 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:51,706 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 22:34:51,707 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 22:34:51,719 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 22:34:51,736 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 22:34:51,736 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 22:34:51,736 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 22:34:51,736 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 22:34:51,736 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 22:34:51,736 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 22:34:51,737 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 22:34:51,737 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 22:34:51,745 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-03-11 22:34:51,760 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-11 22:34:51,760 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:34:51,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-03-11 22:34:51,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-03-11 22:34:51,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-03-11 22:34:51,769 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 22:34:51,777 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 24 transitions, 54 flow [2021-03-11 22:34:51,779 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 24 transitions, 54 flow [2021-03-11 22:34:51,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 54 flow [2021-03-11 22:34:51,786 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-11 22:34:51,786 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:34:51,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 49 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-03-11 22:34:51,788 INFO L116 LiptonReduction]: Number of co-enabled transitions 260 [2021-03-11 22:34:52,243 INFO L131 LiptonReduction]: Checked pairs total: 498 [2021-03-11 22:34:52,243 INFO L133 LiptonReduction]: Total number of compositions: 10 [2021-03-11 22:34:52,244 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 477 [2021-03-11 22:34:52,261 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 22:34:52,261 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:34:52,261 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:52,262 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-03-11 22:34:52,262 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 22:34:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2457983, now seen corresponding path program 1 times [2021-03-11 22:34:52,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:52,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239949441] [2021-03-11 22:34:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:52,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:52,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239949441] [2021-03-11 22:34:52,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:52,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 22:34:52,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911511204] [2021-03-11 22:34:52,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 22:34:52,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:52,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 22:34:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 22:34:52,397 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 36 [2021-03-11 22:34:52,398 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:52,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 36 [2021-03-11 22:34:52,399 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:52,456 INFO L129 PetriNetUnfolder]: 19/50 cut-off events. [2021-03-11 22:34:52,456 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 22:34:52,456 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 50 events. 19/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 106 event pairs, 1 based on Foata normal form. 12/59 useless extension candidates. Maximal degree in co-relation 89. Up to 26 conditions per place. [2021-03-11 22:34:52,458 INFO L132 encePairwiseOnDemand]: 25/36 looper letters, 8 selfloop transitions, 7 changer transitions 0/20 dead transitions. [2021-03-11 22:34:52,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 76 flow [2021-03-11 22:34:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 22:34:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 22:34:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2021-03-11 22:34:52,470 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2021-03-11 22:34:52,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2021-03-11 22:34:52,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2021-03-11 22:34:52,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:52,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2021-03-11 22:34:52,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 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) [2021-03-11 22:34:52,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,483 INFO L185 Difference]: Start difference. First operand has 21 places, 16 transitions, 38 flow. Second operand 3 states and 72 transitions. [2021-03-11 22:34:52,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 76 flow [2021-03-11 22:34:52,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 74 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 22:34:52,492 INFO L241 Difference]: Finished difference. Result has 21 places, 20 transitions, 88 flow [2021-03-11 22:34:52,494 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2021-03-11 22:34:52,495 INFO L335 CegarLoopForPetriNet]: 21 programPoint places, 0 predicate places. [2021-03-11 22:34:52,495 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 88 flow [2021-03-11 22:34:52,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,495 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:52,495 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:52,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 22:34:52,496 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 22:34:52,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:52,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2035964170, now seen corresponding path program 1 times [2021-03-11 22:34:52,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:52,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108754844] [2021-03-11 22:34:52,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:52,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:34:52,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:52,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:34:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:52,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108754844] [2021-03-11 22:34:52,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:52,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 22:34:52,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837908135] [2021-03-11 22:34:52,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:34:52,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:34:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:34:52,561 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2021-03-11 22:34:52,563 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,563 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:52,563 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2021-03-11 22:34:52,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:52,603 INFO L129 PetriNetUnfolder]: 20/55 cut-off events. [2021-03-11 22:34:52,603 INFO L130 PetriNetUnfolder]: For 18/21 co-relation queries the response was YES. [2021-03-11 22:34:52,605 INFO L84 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 55 events. 20/55 cut-off events. For 18/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 151. Up to 28 conditions per place. [2021-03-11 22:34:52,605 INFO L132 encePairwiseOnDemand]: 31/36 looper letters, 9 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2021-03-11 22:34:52,605 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 138 flow [2021-03-11 22:34:52,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 22:34:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 22:34:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2021-03-11 22:34:52,607 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6180555555555556 [2021-03-11 22:34:52,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 89 transitions. [2021-03-11 22:34:52,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 89 transitions. [2021-03-11 22:34:52,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:52,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 89 transitions. [2021-03-11 22:34:52,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,616 INFO L185 Difference]: Start difference. First operand has 21 places, 20 transitions, 88 flow. Second operand 4 states and 89 transitions. [2021-03-11 22:34:52,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 138 flow [2021-03-11 22:34:52,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 22:34:52,619 INFO L241 Difference]: Finished difference. Result has 24 places, 23 transitions, 111 flow [2021-03-11 22:34:52,623 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2021-03-11 22:34:52,624 INFO L335 CegarLoopForPetriNet]: 21 programPoint places, 3 predicate places. [2021-03-11 22:34:52,624 INFO L480 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 111 flow [2021-03-11 22:34:52,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,624 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 22:34:52,625 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 22:34:52,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 22:34:52,625 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 22:34:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 22:34:52,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2108180376, now seen corresponding path program 2 times [2021-03-11 22:34:52,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 22:34:52,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798205646] [2021-03-11 22:34:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 22:34:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 22:34:52,640 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:34:52,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 22:34:52,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 22:34:52,655 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 22:34:52,656 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 22:34:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 22:34:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798205646] [2021-03-11 22:34:52,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 22:34:52,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 22:34:52,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780846332] [2021-03-11 22:34:52,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 22:34:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 22:34:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 22:34:52,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 22:34:52,661 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 36 [2021-03-11 22:34:52,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 111 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 22:34:52,661 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 36 [2021-03-11 22:34:52,661 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 22:34:52,679 INFO L129 PetriNetUnfolder]: 8/25 cut-off events. [2021-03-11 22:34:52,679 INFO L130 PetriNetUnfolder]: For 26/30 co-relation queries the response was YES. [2021-03-11 22:34:52,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 25 events. 8/25 cut-off events. For 26/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs, 0 based on Foata normal form. 5/30 useless extension candidates. Maximal degree in co-relation 73. Up to 11 conditions per place. [2021-03-11 22:34:52,680 INFO L132 encePairwiseOnDemand]: 31/36 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2021-03-11 22:34:52,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 18 transitions, 104 flow [2021-03-11 22:34:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 22:34:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 22:34:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2021-03-11 22:34:52,684 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2021-03-11 22:34:52,684 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2021-03-11 22:34:52,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2021-03-11 22:34:52,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 22:34:52,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2021-03-11 22:34:52,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,686 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,686 INFO L185 Difference]: Start difference. First operand has 24 places, 23 transitions, 111 flow. Second operand 4 states and 87 transitions. [2021-03-11 22:34:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 18 transitions, 104 flow [2021-03-11 22:34:52,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 93 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 22:34:52,690 INFO L241 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2021-03-11 22:34:52,690 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2021-03-11 22:34:52,690 INFO L335 CegarLoopForPetriNet]: 21 programPoint places, 2 predicate places. [2021-03-11 22:34:52,690 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2021-03-11 22:34:52,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 22:34:52,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 22:34:52,695 INFO L202 PluginConnector]: Adding new model Peterson.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 10:34:52 BasicIcfg [2021-03-11 22:34:52,696 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 22:34:52,698 INFO L168 Benchmark]: Toolchain (without parser) took 1270.25 ms. Allocated memory was 255.9 MB in the beginning and 362.8 MB in the end (delta: 107.0 MB). Free memory was 236.5 MB in the beginning and 310.8 MB in the end (delta: -74.3 MB). Peak memory consumption was 33.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:52,699 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 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. [2021-03-11 22:34:52,700 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 22:34:52,701 INFO L168 Benchmark]: Boogie Preprocessor took 12.92 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 916.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:52,706 INFO L168 Benchmark]: RCFGBuilder took 190.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 224.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:52,706 INFO L168 Benchmark]: TraceAbstraction took 1040.00 ms. Allocated memory was 255.9 MB in the beginning and 362.8 MB in the end (delta: 107.0 MB). Free memory was 223.6 MB in the beginning and 310.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.0 GB. [2021-03-11 22:34:52,711 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 0.11 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 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.92 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 916.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 190.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 224.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1040.00 ms. Allocated memory was 255.9 MB in the beginning and 362.8 MB in the end (delta: 107.0 MB). Free memory was 223.6 MB in the beginning and 310.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 464.0ms, 29 PlacesBefore, 21 PlacesAfterwards, 24 TransitionsBefore, 16 TransitionsAfterwards, 260 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 10 TotalNumberOfCompositions, 498 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 287, positive: 245, positive conditional: 0, positive unconditional: 245, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 189, positive: 162, positive conditional: 0, positive unconditional: 162, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 189, positive: 144, positive conditional: 0, positive unconditional: 144, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 207, positive: 69, positive conditional: 0, positive unconditional: 69, negative: 138, negative conditional: 0, negative unconditional: 138, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 287, positive: 83, positive conditional: 0, positive unconditional: 83, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 189, unknown conditional: 0, unknown unconditional: 189] , Statistics on independence cache: Total cache size (in pairs): 55, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 54]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 959.3ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 198.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 520.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 11 SDslu, 2 SDs, 0 SdLazy, 25 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 37.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=2, InterpolantAutomatonStates: 11, 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: 6.1ms SsaConstructionTime, 17.7ms SatisfiabilityAnalysisTime, 107.4ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 45 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...